18 results match your criteria Advanced Optical Materials[Journal]

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Plasmonic Nanotweezers and Nanosensors for Point-of-Care Applications.

Adv Opt Mater 2021 Jul 17;9(13). Epub 2021 Apr 17.

Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.

The capabilities of manipulating and analyzing biological cells, bacteria, viruses, DNAs, and proteins at high resolution are significant in understanding biology and enabling early disease diagnosis. We discuss progress in developments and applications of plasmonic nanotweezers and nanosensors where the plasmon-enhanced light-matter interactions at the nanoscale improve the optical manipulation and analysis of biological objects. Selected examples are presented to illustrate their design and working principles. Read More

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Hydrogel-based diffractive optical elements (hDOEs) using rapid digital photopatterning.

Adv Opt Mater 2021 Jan 25;9(2). Epub 2020 Nov 25.

Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY, USA, 13244.

Hydrogels, due to their optical transparency and biocompatibility, have emerged as an excellent alternative to conventional optical materials for biomedical applications. Advances in microfabrication techniques have helped convert conventional hydrogels into optically functional materials such as hydrogel-based diffraction optical elements (hDOEs). However, key challenges related to device customization and ease/speed of fabrication need to be addressed to enable widespread utility and acceptance of hDOEs in the field. Read More

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January 2021

Dye Stabilization and Wavelength Tunability in Lasing Fibers Based on DNA.

Adv Opt Mater 2020 Nov 16;8(22):2001039. Epub 2020 Sep 16.

NEST Istituto Nanoscienze-CNR and Scuola Normale Superiore Piazza S. Silvestro 12 Pisa I-56127 Italy.

Lasers based on biological materials are attracting an increasing interest in view of their use in integrated and transient photonics. Deoxyribonucleic acid (DNA) as optical biopolymer in combination with highly emissive dyes has been reported to have excellent potential in this respect. However, achieving miniaturized lasing systems based on solid-state DNA shaped in different geometries to confine and enhance emission is still a challenge, and the physicochemical mechanisms originating fluorescence enhancement are not fully understood. Read More

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November 2020

Aggregation-Induced Emissive and Circularly Polarized Homogeneous Sulfono-γ-AApeptide Foldamers.

Adv Opt Mater 2020 Jul 20;8(14). Epub 2020 Apr 20.

Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States.

Through our continuous effort in developing a new class of foldamers, we have both designed and synthesized homogenous sulfono-γ-AApeptides using tetraphenylethylene (TPE) moieties attached to the backbone as luminogenic sidechains. Based on previous crystal structures, we have found that these foldamers adopted a left-handed 4-helix. Due to the constraint of the helical scaffold, the rotation of the TPE moieties were restricted, leading to fluorescent emissive properties with high quantum yields not only at the aggregate state but also in solution. Read More

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Quaternary Ammonium Salt Based NIR-II Probes for Imaging.

Adv Opt Mater 2019 Aug 6;7(15). Epub 2019 May 6.

State Key Laboratory of Virology, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (MOE), Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; Shenzhen Institute of Wuhan University, Shenzhen, 518057, China.

Traditional luminescent materials including fluorescent probes suffer from notorious aggregation-caused quenching (ACQ) in aqueous solutions. Although several approaches such as the aggregation-induced emission (AIE) effect have been developed, it remains a significant challenge to identify an effective and efficient strategy to resolve this issue. Herein, quaternary ammonium salts and as a novel class of bright near infrared window II (NIR-II, 1,000 - 1,700 nm) probes were designed and synthesized, and the twisted intramolecular charge transfer (TICT) formation at the excited state can be effectively suppressed for the newly designed probes. Read More

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Biological Photonic Crystal-Enhanced Plasmonic Mesocapsules: Approaching Single-Molecule Optofluidic-SERS Sensing.

Adv Opt Mater 2019 Jul 2;7(13). Epub 2019 May 2.

School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA.

Surface-enhanced Raman scattering (SERS) sensing in microfluidic devices, namely optofluidic-SERS, suffers an intrinsic trade-off between mass transport and hot spot density, both of which are required for ultra-sensitive detection. To overcome this compromise, photonic crystal-enhanced plasmonic mesocapsules are synthesized, utilizing diatom biosilica decorated with in-situ growth silver nanoparticles (Ag NPs). In our optofluidic-SERS testing, 100× higher enhancement factors and greater than 1,000× better detection limit were achieved compared with traditional colloidal Ag NPs, the improvement of which is attributed to unique properties of the mesocapsules. Read More

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Seeing the Unseen: The Role of Liquid Crystals in Gas-Sensing Technologies.

Adv Opt Mater 2020 Jun 8;8(11):1902117. Epub 2020 Apr 8.

UCIBIO, Departamento de Química Faculdade de Ciências e Tecnologia Universidade Nova de Lisboa Caparica 2829-516, Portugal.

Fast, real-time detection of gases and volatile organic compounds (VOCs) is an emerging research field relevant to most aspects of modern society, from households to health facilities, industrial units, and military environments. Sensor features such as high sensitivity, selectivity, fast response, and low energy consumption are essential. Liquid crystal (LC)-based sensors fulfill these requirements due to their chemical diversity, inherent self-assembly potential, and reversible molecular order, resulting in tunable stimuliresponsive soft materials. Read More

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Pairing Toroidal and Magnetic Dipole Resonances in Elliptic Dielectric Rod Metasurfaces for Reconfigurable Wavefront Manipulation in Reflection.

Adv Opt Mater 2018 Nov 17;6(22):1800633. Epub 2018 Sep 17.

Institute of Electronic Structure and Laser FORTH GR-71110 Heraklion Crete Greece.

A novel approach for reconfigurable wavefront manipulation with gradient metasurfaces based on permittivity-modulated elliptic dielectric rods is proposed. It is shown that the required 2π phase span in the local electromagnetic response of the metasurface can be achieved by pairing the lowest magnetic dipole Mie resonance with a toroidal dipole Mie resonance, instead of using the lowest two Mie resonances corresponding to fundamental electric and magnetic dipole resonances as customarily exercised. This approach allows for the precise matching of both the resonance frequencies and quality factors. Read More

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November 2018

Additive Manufacturing: Applications and Directions in Photonics and Optoelectronics.

Adv Opt Mater 2019 Jan 16;7(1):1800419. Epub 2018 Sep 16.

NEST Istituto Nanoscienze-CNR Piazza San Silvestro 12 I-56127 Pisa Italy.

The combination of materials with targeted optical properties and of complex, 3D architectures, which can be nowadays obtained by additive manufacturing, opens unprecedented opportunities for developing new integrated systems in photonics and optoelectronics. The recent progress in additive technologies for processing optical materials is here presented, with emphasis on accessible geometries, achievable spatial resolution, and requirements for printable optical materials. Relevant examples of photonic and optoelectronic devices fabricated by 3D printing are shown, which include light-emitting diodes, lasers, waveguides, optical sensors, photonic crystals and metamaterials, and micro-optical components. Read More

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January 2019

Hybrid Laser Printing of 3D, Multiscale, Multimaterial Hydrogel Structures.

Adv Opt Mater 2019 7;7(21). Epub 2019 Aug 7.

Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA.

Fabrication of multiscale, multi-material three-dimensional (3D) structures at high resolution is difficult using current technologies. This is especially significant when working with hydrated and mechanically weak hydrogel materials. In this work, a new hybrid laser printing (HLP) technology is reported to print complex, multiscale, multimaterial, 3D hydrogel structures with microscale resolution. Read More

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Programmable Microfluidic Synthesis of Over One Thousand Uniquely Identifiable Spectral Codes.

Adv Opt Mater 2017 Feb 18;5(3). Epub 2016 Oct 18.

Department of Biochemistry and Biophysics, University of San Francisco, San Francisco, CA, 94158-2517, USA.

Encoded microparticles have become a powerful tool for a wide array of applications, including high-throughput sample tracking and massively parallel biological multiplexing. Spectral encoding, where particles are encoded with distinct luminescence spectra, provides a particularly appealing encoding strategy because of the ease of reading codes and assay flexibility. To date, spectral encoding has been limited in the number of codes that can be accurately resolved. Read More

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February 2017

Enhancing the Angular Sensitivity of Plasmonic Sensors Using Hyperbolic Metamaterials.

Adv Opt Mater 2016 Nov 2;4(11):1767-1772. Epub 2016 Aug 2.

Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, OH 44106, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA; Department of Physics and CNR-NANOTEC UOS of Cosenza, Licryl Laboratory, University of Calabria, 87036 Rende, Italy.

Surface plasmon resonance (SPR) sensors operate mainly on prism and grating coupling techniques, with spectral and angular scans being the two major interrogation schemes. Among them, the angular scan technique has several advantages including higher measurement precision owing to its higher signal-to-noise ratio. The currently available SPR sensor arrangements provide a maximum angular sensitivity of 500°-600° per RIU. Read More

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November 2016

Active Polymer Microfiber with Controlled Polarization Sensitivity.

Adv Opt Mater 2016 Mar 18;4(3):371-377. Epub 2015 Nov 18.

Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, United States.

of an active polymer microfiber has been proposed and realized with the electrospun method. The fluorescence intensity guiding through this active polymer microfiber shows high sensitivity to the polarization state of the excitation light. What is more, the fluorescence out-coupled from tip of the microfiber can be of designed polarization state. Read More

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Planar Photonic Crystal Biosensor for Quantitative Label-Free Cell Attachment Microscopy.

Adv Opt Mater 2015 Nov 22;3(11):1623-1632. Epub 2015 Aug 22.

Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.

In this study, a planar-surface photonic crystal (PC) biosensor for quantitative, kinetic, label-free imaging of cell-surface interactions is demonstrated. The planar biosensor surface eliminates external stimuli to the cells caused by substrate topography to more accurately reflect smooth surface environment encountered by many cell types in vitro. Here, a fabrication approach that combines nanoreplica molding and a horizontal dipping process is used to planarize the surface of the PC biosensor. Read More

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November 2015

Complex Photonic Structures for Light Harvesting.

Adv Opt Mater 2015 Jun 25;3(6):722-743. Epub 2015 Mar 25.

European Laboratory for Non-linear Spectroscopy (LENS), Università di Firenze via Nello Carrara 1, 50019, Sesto Fiorentino, (FI), Italy ; Department of Physics, Università di Firenze via Nello Carrara 1, 50019, Sesto Fiorentino, (FI), Italy.

Over the last few years, micro- and nanophotonics have roused a strong interest in the scientific community for their promising impact on the development of novel kinds of solar cells. Certain thin- and ultrathin-film solar cells are made of innovative, often cheap, materials which suffer from a low energy conversion efficiency. Light-trapping mechanisms based on nanophotonics principles are particularly suited to enhance the absorption of electromagnetic waves in these thin media without changing the material composition. Read More

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Flexible Distributed Bragg Reflectors from Nanocolumnar Templates.

Adv Opt Mater 2015 Feb 17;3(2):171-175. Epub 2015 Feb 17.

Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla C/Américo Vespucio 49, Sevilla, 41092, Spain E-mail: ;

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February 2015

Controlled, Bio-inspired Self-Assembly of Cellulose-Based Chiral Reflectors.

Adv Opt Mater 2014 Jul 30;2(7):646-650. Epub 2014 May 30.

Department of Chemistry, University of Cambridge Lensfield Road, Cambridge, CB2 1EW, UK.

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Selectively Patterning Polymer Opal Films via Microimprint Lithography.

Adv Opt Mater 2014 Nov 1;2(11):1098-1104. Epub 2014 Sep 1.

Nanophotonic Centre Cavendish Laboratory University of Cambridge CB3 0HE, UK E-mail:

Large-scale structural color flexible coatings have been hard to create, and patterning color on them is key to many applications, including large-area strain sensors, wall-size displays, security devices, and smart fabrics. To achieve controlled tuning, a micro-imprinting technique is applied here to pattern both the surface morphology and the structural color of the polymer opal films (POFs). These POFs are made of 3D ordered arrays of hard spherical particles embedded inside soft shells. Read More

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November 2014
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