148 results match your criteria graphene fragment

Local current analysis on defective zigzag graphene nanoribbons devices for biosensor material applications.

J Comput Chem 2021 May 14. Epub 2021 May 14.

Laboratoire de Physique et Chimie Théoriques, CNRS-Université de Lorraine, UMR 7019, ICPM, Metz, France.

In this contribution, we aim at investigating the mechanism of biosensing in graphene-based materials from first principles. Inspired by recent experiments, we construct an atomistic model composed of a pyrene molecule serving as a linker fragment, which is used in experiment to attach certain aptamers, and a defective zigzag graphene nanoribbons (ZGNRs). Density functional theory including dispersive interaction is employed to study the energetics of the linker absorption on the defective ZGNRs. Read More

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Visualizing Lithiation of Graphite Composite Anodes in All-Solid-State Batteries Using Time-of-Flight Secondary Ion Mass Spectrometry.

J Phys Chem Lett 2021 May 11:4623-4627. Epub 2021 May 11.

Applied Materials Technology Center, Technology Division, Panasonic Corporation, 3-1-1 Yagumo-nakamachi, Moriguchi, Osaka 570-8501, Japan.

A fundamental understanding of lithiation dynamics in composite electrodes is essential for the development of all-solid-state batteries with high capacity and rate capability. However, a comprehensive methodology to monitor the time evolution of lithiation in a composite electrode has not been fully established because of the limitations of the characterization techniques currently employed. In this study, we demonstrate the visualization of the transient distribution of Li in composite graphite anodes during cell operation using time-of-flight secondary ion mass spectrometry. Read More

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Electrochemical aptasensor for 17β-estradiol using disposable laser scribed graphene electrodes.

Biosens Bioelectron 2021 Apr 28;185:113247. Epub 2021 Apr 28.

Polymer Biointerface Centre, School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand; MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, PO Box 600, Wellington, New Zealand. Electronic address:

17β-Estradiol (E2), the strongest of the three major physiological estrogens in females, is an important factor in the female reproductive system. The abnormal level of E2 causes health issues, such as weak bones, urinary tract infections and even depression. Here, we present a novel, sensitive and selective, electrochemical aptasensor for detection of 17β-estradiol (E2). Read More

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High-Coverage Screening of Sulfonamide Metabolites in Goat Milk by Magnetic Doped S Graphene Combined with Ultrahigh-Performance Liquid Chromatography-High-Resolution Mass Spectrometry.

J Agric Food Chem 2021 Apr 16;69(16):4755-4765. Epub 2021 Apr 16.

School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China.

Currently, there are more than 1000 varieties of synthetic sulfonamides universally used as antibiotics causing severe results of potential carcinogenicity and drug resistance for human health due to excessive residue of animal-derived food. A facile and novel approach for untargeted screening of sulfonamides (SAs) and metabolites was proposed based on magnetic solid-phase extraction-ultrahigh-performance liquid chromatography-tandem high-resolution mass spectrometry (MSPE-UHPLC-HRMS). Compared with QuEChERS without the clean-up procedure and SPE in terms of matrix effect and absolute recovery, magnetic doped S graphene (S-doping level: 2. Read More

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Functionalized graphene oxide in situ initiated ring-opening polymerization for highly sensitive sensing of cytokeratin-19 fragment.

Mikrochim Acta 2021 Mar 12;188(4):123. Epub 2021 Mar 12.

School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.

Improving the sensitivity of detection is crucial to monitor biomarker, assess toxicity, and track therapeutic agent. Herein, a sensitivity-improved immunosensor is reported for the first time via functionalized graphene oxide (GO) and a "grafting-to" ring-opening polymerization (ROP) dual signal amplification strategy. Through the ROP reaction using 2-[(4-ferrocenylbutoxy)methyl] oxirane (FcEpo) as the monomer, lots of electroactive tags are linked in situ from multiple initiation sites on the GO surface modified with ethanol amine (GO-ETA), thereby achieving high sensitivity even in the case of trace amounts of tumor markers. Read More

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Electrochemical determination of hantavirus using gold nanoparticle-modified graphene as an electrode material and Cu-based metal-organic framework assisted signal generation.

Mikrochim Acta 2021 Mar 6;188(4):112. Epub 2021 Mar 6.

School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China.

An electrochemical biosensor was prepared for nucleic acid-based hantavirus detection using a Cu-based metal-organic framework (CuMOF) as a signal tag. The CuMOF was synthesized by the solvothermal method and then covalently bonded with signal DNA (sDNA) probes. The Au nanoparticles and reduced graphene oxide composite were deposited on the electrode surface by electroreduction as support substrate and was then functionalized with capture DNA (cDNA) probes by self-assembly. Read More

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Lactone radical transformed methyl mercaptan-adsorbed activated carbon into graphene oxide modified activated carbon.

J Hazard Mater 2021 Jul 10;413:124527. Epub 2020 Nov 10.

SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, PR China.

Activated carbon was a widely-used adsorbent. However, it was usually classified as a hazardous waste after saturation adsorption for one pollution. For the first time, this article reported a regeneration method for the activated carbon saturated with methyl mercaptan. Read More

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Fragmentation of polymer nanocomposites: modulation by dry and wet weathering, fractionation, and nanomaterial filler.

Environ Sci Nano 2020 ;7(6):1742-1758

EPA, ORD, Center for Environmental Solutions and Emergency Response (CESER), Cincinnati, OH, USA.

In recent years, an increasing number of polymeric composites incorporating engineered nanomaterials (ENMs) have reached the market. Such nano-enabled products (NEPs) present enhanced performance through improved mechanical, thermal, UV protection, electrical, and gas barrier properties. However, little is known about how environmental weathering impacts ENM release, especially for high-tonnage NEPs like kaolin products, which have not been extensively examined by the scientific community. Read More

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January 2020

Effects of Carbon Nanowalls (CNWs) Substrates on Soft Ionization of Low-Molecular-Weight Organic Compoundsin Surface-Assisted Laser Desorption/Ionization Mass Spectrometry (SALDI-MS).

Nanomaterials (Basel) 2021 Jan 20;11(2). Epub 2021 Jan 20.

Center for Low-temperature Plasma Sciences, Nagoya University, Furo, Chikusa, Nagoya 464-8603, Japan.

Carbon nanowalls (CNWs), which are vertically oriented multi-layer graphene sheets, were employed in surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) measurements to detect low-molecular-weight organic compounds. CNWs substrates with widely different wall-to-wall distances from 142 to 467 nm were synthesized using a radical-injection plasma-enhanced chemical vapor deposition (RI-PECVD) system with nanosecond pulse biasing to a sample stage. When survival yield (SY) values of -benzylpyridinium chloride (N-BP-Cl) were examined, which is commonly used to evaluate desorption/ionization efficiency, a narrower wall-to-wall distance presented a higher SY value. Read More

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January 2021

Regional Embedding Enables High-Level Quantum Chemistry for Surface Science.

J Phys Chem Lett 2021 Jan 21;12(3):1104-1109. Epub 2021 Jan 21.

Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, United States.

Compared to common density functionals, ab initio wave function methods can provide greater reliability and accuracy, which could prove useful when modeling adsorbates or defects of otherwise periodic systems. However, the breaking of translational symmetry necessitates large supercells that are often prohibitive for correlated wave function methods. As an alternative, this paper introduces the regional embedding approach, which enables correlated wave function treatments of a target fragment of interest through small, fragment-localized orbital spaces constructed using a simple overlap criterion. Read More

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January 2021

DNAzyme-Au nanoprobe coupled with graphene-oxide-loaded hybridization chain reaction signal amplification for fluorometric determination of alkaline phosphatase.

Mikrochim Acta 2021 Jan 2;188(1). Epub 2021 Jan 2.

Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.

A sensing platform is presented for the determination of alkaline phosphatase (ALP) activity based on the cooperation of DNAzyme-Au spherical nucleic acid nanoprobe with the graphene-oxide-loaded hybridization chain reaction (HCR/GO) system to achieve good detection sensitivity and specificity. This assay takes advantage of the strong affinity of pyrophosphate (PPi) to Cu ions and the fact that ALP can hydrolyze pyrophosphate (PPi) to release free Cu ions. In the presence of ALP, the released Cu can promote the Cu-dependent DNAzyme to cleave the substrate that generates a shorter DNA fragment, which is responsible for further triggering the HCR/GO system to form a long fluorescence dsDNA and thereby giving an amplified fluorescence signal. Read More

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January 2021

Au doped poly-thionine and poly-m-Cresol purple: Synthesis and their application in simultaneously electrochemical detection of two lung cancer markers CEA and CYFRA21-1.

Talanta 2021 Mar 4;224:121816. Epub 2020 Nov 4.

Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Bio-perception & Intelligent Information Processing, School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, 400044, PR China. Electronic address:

The single tumor antigen does not have enough specificity and sensitivity to meet the accurate diagnostic criteria, and single antigen measurement is often prone to false negative and false positive perceptions. Therefore, simultaneous monitoring of multiple tumor antigens related to precise tumors in serum samples has become an interesting and encouraging analytical method. In this work, we demonstrated an electrochemical biosensor based on multiple signal amplification methods, and simultaneously detect two lung cancer markers, cytokeratin 19 fragment 21-1 (CYFRA21-1) and carcinoembryonic antigen (CEA). Read More

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Fully Conjugated Pyrene-BODIPY and Pyrene-BODIPY-Ferrocene Dyads and Triads: Synthesis, Characterization, and Selective Noncovalent Interactions with Nanocarbon Materials.

J Phys Chem B 2021 01 28;125(1):360-371. Epub 2020 Dec 28.

Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.

Several pyrene-boron-dipyrromethene (BODIPY) and pyrene-BODIPY-ferrocene derivatives with a fully conjugated pyrene fragment appended to the α-position(s) of the BODIPY core have been prepared by Knoevenagel condensation reaction and characterized by one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR), UV-vis, fluorescence spectroscopy, high-resolution mass spectrometry as well as X-ray crystallography. The redox properties of new donor-acceptor BODIPY dyads and triads were studied by electrochemical (cyclic voltammetry (CV) and differential pulse voltammetry (DPV)) and spectroelectrochemical approaches. Formation of weakly bonded noncovalent complexes between the new pyrene-BODIPYs and nanocarbon materials (C, C, single-walled carbon nanotube (SWCNT), and graphene) was studied by UV-vis, steady-state fluorescent, and time-resolved transient absorption spectroscopy. Read More

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January 2021

Aggregation-Induced Electrochemiluminescence Bioconjugates of Apoferritin-Encapsulated Iridium(III) Complexes for Biosensing Application.

Anal Chem 2021 01 21;93(3):1553-1560. Epub 2020 Dec 21.

Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.

An intriguing aggregation-induced electrochemiluminescence (AIECL) bioconjugate was fabricated by encapsulating -tris(2-phenylpyridine)iridium(III) complexes [Ir(ppy)] in the apoferritin (apoFt) cavity for biosensing application. Based on the unique pH-dependent disassembly/reassembly characteristic of apoFt, approximately 44.3 molecules of Ir(ppy) aggregated in the single cavity through both intermolecular π-π-stacking interactions and hydrogen bonds that efficiently restricted the intramolecular motions to trigger the AIECL effect. Read More

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January 2021

MALDI-MS analysis of disaccharide isomers using graphene oxide as MALDI matrix.

Food Chem 2021 Apr 12;342:128356. Epub 2020 Oct 12.

Department of Chemistry, Chungnam National University, Daejeon, Republic of Korea; Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon, Republic of Korea. Electronic address:

Disaccharides are sugars composed of two monosaccharides joined by a glycosidic linkage. The specific properties of a disaccharide depend on the type of the glycosidic linkage and the identity of the two component monosaccharides. In this work, seven disaccharide isomers (gentiobiose, isomaltose, melibiose, lactose, maltose, cellobiose, and sucrose) were analyzed by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) using a graphene oxide matrix. Read More

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Resolving Isomeric Structures of Native Glycans by Nanoflow Porous Graphitized Carbon Chromatography-Mass Spectrometry.

Anal Chem 2020 10 6;92(20):14038-14046. Epub 2020 Oct 6.

Centre for Biologics Evaluation, Biologic and Radiopharmaceutical Drugs Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada.

Characterization of the structural diversity of glycans by liquid chromatography-tandem mass spectrometry (LC-MS/MS) remains an analytical challenge in large-scale glycomics applications because of the presence of heterogeneous composition, ubiquitous isomers, lability of post-translational glycan modifications, and complexity of data interpretation. High-resolution separation of glycan isomers differentiating from positional, linkage, branching, and anomeric structures is often a prerequisite to ensure the comprehensive glycan identification. Here, we developed a straightforward method using self-packed capillary porous graphitic carbon (PGC) columns for nanoflow LC-MS/MS analyses of native glycans released from glycoproteins. Read More

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October 2020

Dual Energy Transfer-Based DNA/Graphene Oxide Nanocomplex Probe for Highly Robust and Accurate Monitoring of Apoptosis-Related microRNAs.

Anal Chem 2020 09 19;92(17):11565-11572. Epub 2020 Aug 19.

Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China.

Fluorescent labeled single-stranded DNA (ssDNA) molecules physisorbed on graphene oxide (GO) have been extensively explored as a useful sensing platform. However, this approach faces challenges when applied to complex biological samples due to heavy nonspecific desorption of nontarget molecules from GO. To overcome this problem, we introduced a capture DNA (cDNA) fragment with a poly adenine (poly-A) extension into the physisorption system that greatly reduces nonspecific desorption and false positive signal due to strong binding between poly-A and GO. Read More

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September 2020

Fluorometric determination of agrA gene transcription in methicillin-resistant Staphylococcus aureus with a graphene oxide-based assay using strand-displacement polymerization recycling and hybridization chain reaction.

Mikrochim Acta 2020 06 5;187(7):372. Epub 2020 Jun 5.

Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, 410208, Hunan, People's Republic of China.

A graphene oxide (GO)-based fluorescent bioassay was developed to quantify agrA gene transcription (its mRNA) in methicillin-resistant Staphylococcus aureus (MRSA). This method is based on the use of Klenow fragment (KF)-assisted target recycling amplification and hybridization chain reaction (HCR). A triple complex was designed that contained a capture probe (CP), a trigger probe (TP), and a help probe (HP), which were partially complementary to one another. Read More

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Inkjet-printed electrochemically reduced graphene oxide microelectrode as a platform for HT-2 mycotoxin immunoenzymatic biosensing.

Biosens Bioelectron 2020 May 21;156:112109. Epub 2020 Feb 21.

Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Bellaterra, ES-08193, Spain; ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona, ES-08010, Spain. Electronic address:

The design and application of an inkjet-printed electrochemically reduced graphene oxide microelectrode for HT-2 mycotoxin immunoenzymatic biosensing is reported. A water-based graphene oxide ink was first formulated and single-drop line working microelectrodes were inkjet-printed onto poly(ethylene 2,6-naphthalate) substrates, with dimensions of 78 μm in width and 30 nm in height after solvent evaporation. The printed graphene oxide microelectrodes were electrochemically reduced and characterized by Raman and X-ray photoelectron spectroscopies in addition to microscopies. Read More

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High-Yield Production of Few-Layer Graphene via New-fashioned Strategy Combining Resonance Ball Milling and Hydrothermal Exfoliation.

Nanomaterials (Basel) 2020 Apr 2;10(4). Epub 2020 Apr 2.

State Key Laboratory of Tribology, School of Mechanical Engineering, Tsinghua University, Beijing 100086, China.

Graphene shows great potential applications in functional coating, electrodes, and ultrasensitive sensors, but high-yield and scalable preparation of few-layer graphene (FLG) by mechanical exfoliation method is still a formidable challenge. In this work, a novel two-step method for high-yield preparation of FLG is developed by combining resonance ball milling and hydrothermal treatment. During the resonance ball milling process, the utilization of magnetic FeO nanoparticles as a new "particle wedge" is beneficial to facilitate fragment and delamination of graphitic layers. Read More

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Theoretical Spectroscopic Studies on Chemical and Electronic Structures of Selenocysteine and Pyrrolysine.

J Phys Chem A 2020 Mar 5;124(11):2215-2224. Epub 2020 Mar 5.

Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China.

The chemical and electronic structures of the 21st and 22nd proteinogenic amino acid selenocysteine (Sec), pyrrolysine (Pyl), and their derivatives (deprotonated and protonated ions) were extensively characterized for the first time. Through the fragment based step-by-step research on their potential energy surface (PES), electronic energies of the most stable conformers of Sec, Pyl and the related ions were finally determined at the advanced CBS-QB3 and DSD-PBEP86-D3(BJ)/aug-cc-pVTZ levels, respectively, with the identification of many new low-energy conformers. The infrared spectra (IR) at 298 K of the most abundant conformers in different forms were scaled by comparison with the anharmonic frequency calculations and analyzed comparing with the experimental spectra of similar molecules. Read More

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Graphene Field Effect Transistor-Based Immunosensor for Ultrasensitive Noncompetitive Detection of Small Antigens.

ACS Sens 2020 01 15;5(1):24-28. Epub 2020 Jan 15.

Institute of Scientific and Industrial Research , Osaka University , Ibaraki , Osaka 567-0047 , Japan.

Due to its high carrier mobility, graphene is considered a suitable material for use in field-effect transistors. However, its application to immunosensing of small molecules is still elusive. To investigate the potential of graphene field effect transistors (G-FET) as a sensor for small molecules with small or no charge, we applied the open-sandwich immunoassay (OS-IA), which detects low-molecular-weight antigens noncompetitively, to G-FET. Read More

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January 2020

Facile One-Step Synthesis and Enhanced Optical Nonlinearity of Graphene-γMnS.

Nanomaterials (Basel) 2019 Nov 21;9(12). Epub 2019 Nov 21.

Institute of Micro/Nano Photonic Materials and Applications, School of Physics and Electronics, Henan University, Kaifeng 475004, China.

Graphene-γMnS were prepared by facile one-step hydrothermal method. Structures and properties of samples were explored by characterization, and nonlinear optical (NLO) enhancement of nanocomposites (NCs) was fully studied. Nanoparticles and NCs were tested at 532 nm by a Z-scan technique. Read More

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November 2019

Thermally stable and uniform DNA amplification with picosecond laser ablated graphene rapid thermal cycling device.

Biosens Bioelectron 2019 Dec 9;146:111581. Epub 2019 Aug 9.

Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan, ROC. Electronic address:

Rapid thermal cycling (RTC) in an on-chip device can perform DNA amplification in vitro through precise thermal control at each step of the polymerase chain reaction (PCR). This study reports a straightforward fabrication technique for patterning an on-chip graphene-based device with hole arrays, in which the mechanism of surface structures can achieve stable and uniform thermal control for the amplification of DNA fragments. A thin-film based PCR device was fabricated using picosecond laser (PS-laser) ablation of the multilayer graphene (MLG). Read More

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December 2019

Conducting Coronene Cation Radical Salt Containing Magnetic Metal Ions.

Inorg Chem 2019 Oct 10;58(20):14068-14074. Epub 2019 Oct 10.

Division of Chemistry, Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku , Kyoto 606-8502 , Japan.

Coronene is the smallest homologue of benzene and is the smallest fragment of graphene among 6-fold symmetric polycyclic aromatic hydrocarbons. In this study, we obtained the first coronene cation radical solid containing magnetic counterions by an electrochemical method. Coronene monocations in the 1:1 salt, (coronene)(FeBr), assemble in a stacking manner via π-π interactions, which lead to a rather high room-temperature conductivity of 0. Read More

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October 2019

Benzo[]triangulene: A Spin 1/2 Graphene Fragment.

J Org Chem 2020 Jan 17;85(1):92-100. Epub 2019 Oct 17.

Department of Chemistry , University of Basel , St. Johanns-Ring 19 , CH-4056 Basel , Switzerland.

How does edge modification affect spin distribution in open-shell graphene fragments? We investigated this effect by analyzing spin-delocalization in benzo[]-triangulene, a spin 1/2 graphene fragment composed of seven benzenoid rings fused in a hybrid zigzag/armchair fashion. Six rings of this system form the core of Clar's hydrocarbon triangulene, to which an additional ring is annulated in the zigzag region. The singly occupied molecular orbital (SOMO) of this hydrocarbon radical resembles both SOMOs of triangulene, but the spin density is distributed over the core in a nonuniform fashion. Read More

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January 2020

Target-inspired Pb-dependent DNAzyme for ultrasensitive electrochemical sensor based on MoS-AuPt nanocomposites and hemin/G-quadruplex DNAzyme as signal amplifier.

Biosens Bioelectron 2019 Nov 3;144:111560. Epub 2019 Aug 3.

School of Public Health and Management, Chongqing Medical University, Box 197#, No.1,Yi Xue Yuan Road, Yuzhong District, Chongqing, 400016, China. Electronic address:

In this work, a novel Pb electrochemical DNAzyme sensor was developed for ultrasensitive detection of lead ions (Pb) in water environment by coupling with the MoS-AuPt nanomaterials and hemin/G-quadruplex DNAzyme, which acting as the electrocatalytic signal tag. Streptavidin (SA) modified tin dioxide-functionalized reduced graphene oxide (rGO-SnO) /gold nanoparticles (AuNPs) served as a sensor platform for enhancing conductivity and immobilizing more Pb-specific DNAzyme. In the presence of Pb, the Pb-dependent DNAzyme specifically reacted with Pb, cleaving the substrate strand (SS) into two free fragment and releasing the biotin-modified enzyme strand (Bio-ES) on the electrode. Read More

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November 2019

Photolytic and Reductive Activations of 2-Arsaethynolate in a Uranium-Triamidoamine Complex: Decarbonylative Arsenic-Group Transfer Reactions and Trapping of a Highly Bent and Reduced Form.

Chemistry 2019 Nov 8;25(62):14246-14252. Epub 2019 Oct 8.

School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.

Little is known about the chemistry of the 2-arsaethynolate anion, but to date it has exclusively undergone fragmentation reactions when reduced. Herein, we report the synthesis of [U(Tren )(OCAs)] (2, Tren =N(CH CH NSiiPr ) ), which is the first isolable actinide-2-arsaethynolate linkage. UV-photolysis of 2 results in decarbonylation, but the putative [U(Tren )(As)] product was not isolated and instead only [{U(Tren )} (μ-η :η -As H )] (3) was formed. Read More

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November 2019

Adhesion of Epoxy Resin with Hexagonal Boron Nitride and Graphite.

ACS Omega 2019 Mar 1;4(3):4491-4504. Epub 2019 Mar 1.

Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan.

Adhesion interaction of epoxy resin with the basal surfaces of h-BN and graphite is investigated with the first-principles density functional theory calculations in conjunction with the dispersion correction. The h-BN/epoxy and graphite/epoxy interfaces play an important role in producing nanocomposite materials with excellent thermal dissipation properties. The epoxy resin structure is simulated by using four kinds of fragmentary models. Read More

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Ultrasensitive electrochemical detection of Mycobacterium tuberculosis IS6110 fragment using gold nanoparticles decorated fullerene nanoparticles/nitrogen-doped graphene nanosheet as signal tags.

Anal Chim Acta 2019 Nov 22;1080:75-83. Epub 2019 Jun 22.

Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China. Electronic address:

Tuberculosis (TB), caused by Mycobacterium tuberculosis (MTB), remains the top fatal infection continuing to threat public health, and the present detection method for MTB is facing great challenges with the global TB burden. In response to this issue, a novel electrochemical DNA biosensor was developed for detecting the IS6110 fragment within MTB. For the first time, the nanohybrid of gold nanoparticles decorated fullerene nanoparticles/nitrogen-doped graphene nanosheet (Au-nano-C/NGS) directly served as a new signal tag to generate signal response without additional redox molecules and subsequently labeled with signal probes (SPs) to form tracer label to achieve signal amplification. Read More

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November 2019