Publications by authors named "Beifang Yang"

14 Publications

  • Page 1 of 1

Immunogenicity and safety of purified vero cell-cultured rabies vaccine under Zagreb 2-1-1 or 5-dose Essen regimen in the healthy Chinese subjects: a randomized, double-blind, positive controlled phase 3 clinical trial.

Hum Vaccin Immunother 2021 02 12;17(2):351-357. Epub 2020 Aug 12.

Hubei Center for Disease Prevention and Control , Wuhan, China.

: The aims of the study were to evaluate the non-inferiority of the safety and immunogenicity of a new trial purified vero cell-cultured rabies vaccine (trial vaccine) in healthy subjects comparing with the control purified vero cell-cultured rabies vaccine (control vaccine) following Essen regimen and to evaluate the non-inferiority of the safety and immunogenicity of the trial vaccine following two intramuscular regimens, between Zagreb and Essen regimen. : Serum samples were collected before vaccination and on d 7, 14, 35/42 post vaccination. Adverse events (AEs) were recorded for 30 d following each vaccination. This study was registered in the Chinese Clinical Trial Registry (ChiCTR-PPR-15007057). : There was no significant difference in the incidence of AEs, local and systemic reactions, among Zagreb group, Essen group, and control group. But the incidence of solicited AEs was a significant difference among the three groups ( = 0.0498). The incidence of solicited AEs was higher in Essen group than that in control group and Zagreb group ( = 0.0278, = 0.0248). In the subjects whose antibodies were seronegative before vaccination, the seroconversion rates of antibodies among three groups were all 100.0% on d 14 and d 35/42. The Essen group was not inferior to the control group, and the Zagreb group was not inferior to the Essen group on d 14. On d 14 and d 35/42, the geometric mean concentration of the three groups was much higher than the immune protection level of 0.5 IU/ml. : The trial vaccine had good safety and immunogenicity, and the trial vaccine is not inferior to the control vaccine. PVRV: purified vero cell-cultured rabies vaccine; AE: adverse event; CI: confidence interval; GMC: geometric mean concentration; IM: intramuscular; NIFDC: National Institutes for Food and Drug Control; PPS: per-protocol set; SS: safety set; REFIT: Rapid Fluorescent Focus Inhibition Test; RVNA: rabies virus neutralizing antibody; WHO: World Health Organization.
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http://dx.doi.org/10.1080/21645515.2020.1778408DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7899666PMC
February 2021

Adjusting cotton planting density under the climatic conditions of Henan Province, China.

PLoS One 2019 26;14(9):e0222395. Epub 2019 Sep 26.

Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, China.

The growth and development of cotton are closely related to climatic variables such as temperature and solar radiation. Adjusting planting density is one of the most effective measures for maximizing cotton yield under certain climatic conditions. The objectives of this study were (1) to determine the optimum planting density and the corresponding leaf area index (LAI) and yield under the climatic conditions of Henan Province, China, and (2) to learn how climatic conditions influence cotton growth, yield, and yield components. A three-year (2013-2015) field experiment was conducted in Anyang, Henan Province, using cultivar SCRC28 across six planting density treatments: 15,000, 33,000, 51,000, 69,000, 87,000, and 105,000 plants ha-1. The data showed that the yield attributes, including seed cotton yield, lint yield, dry matter accumulation, and the LAI, increased as planting density increased. Consequently, the treatment of the maximum density with 105,000 plants ha-1 was the highest-yielding over three years, with the LAIs averaged across the three years being 0.37 at the bud stage, 2.36 at the flower and boll-forming stage, and 1.37 at the boll-opening stage. Furthermore, the correlation between the cotton yield attributes and meteorological conditions indicated that light interception (LI) and the diurnal temperature range were the climatic factors that most strongly influenced cotton seed yield. Moreover, the influence of the number of growing degree days (GDD) on cotton was different at different growth stages. These observations will be useful for determining best management practices for cotton production under the climatic conditions of Henan Province, China.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0222395PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6762138PMC
March 2020

How do cotton light interception and carbohydrate partitioning respond to cropping systems including monoculture, intercropping with wheat, and direct-seeding after wheat?

PLoS One 2019 20;14(5):e0217243. Epub 2019 May 20.

Institute of Cotton Research of the Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, Henan, P. R. China.

Different cotton (Gossypium hirsutum L.)-wheat (Triticum aestivum) planting patterns are widely applied in the Yellow River Valley of China, and crop yield mainly depends on light interception. However, little information is available on how cotton canopy light capturing and yield distribution are affected by planting patterns. Hence, field experiments were conducted in 2016 and 2017 to study the response of cotton canopy light interception, square and boll distribution, the leaf area index (LAI) and biomass accumulation to three planting patterns: a cotton monoculture (CM, planted on 15 May) system, a cotton/wheat relay intercropping (CWI, planted on 15 May) system, in which three rows of wheat rows were intercropped with one row of cotton, and a system in which cotton was directly seeded after wheat (CWD, planted on 15 June). The following results were obtained: 1) greater light capture capacity was observed for cotton plants in the CM and CWI compared with the CWD, and the light interception of the CM was 22.4% and 51.4% greater than that of the CWI and CWD, respectively, at 30 days after sowing (DAS) in 2016; 2) more bolls occurred at the first sympodial position (SP) than at other SPs for plants in the CM; 3) based on the LAI and biomass accumulation, the cotton growth rate was the greatest in CWD, followed by CM and CWI; and 4) the CM produced significantly greater yields than did the other two treatments because it yielded more bolls and greater boll weight. Information on the characteristics of cotton growth and development in response to different planting patterns would be helpful for understanding the response of cotton yields to planting patterns and would facilitate the improvement of cotton productivity.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0217243PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6527220PMC
February 2020

Integrative functional genomics identifies regulatory genetic variant modulating RAB31 expression and altering susceptibility to breast cancer.

Mol Carcinog 2018 12 19;57(12):1845-1854. Epub 2018 Sep 19.

Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Despite the successes of genome-wide association study (GWAS) in identifying breast cancer (BC) risk-associated variants, only a small fraction of the heritability can be explained. The greatest challenge in the post-GWAS is to identify causal variants and underlying mechanisms responsible for BC susceptibility. In this study, we integrated functional genomic data from ENCODE ChIP-seq, ANNOVAR, and the TRANSFAC matrix to identify potentially regulatory variants with modulating FOXA1-binding affinity across the whole genome, and then conducted a two-stage case-control study including 2164 cases and 2382 controls to investigate the associations between candidate SNPs and BC susceptibility. We identified a BC susceptibility SNP, rs6506689 G>T, with an odds ratio (OR) of 1.23 (95% confidence interval = 1.07-1.40, P = 0.003) under a dominant model in the combined study. Biological assays indicated that the germline G>T variation at rs6506689 creates a FOXA1-binding site and up-regulates the expression of RAB31, thus playing an important role in the development of BC. Our results highlight the importance of regulatory genetic variants in the development of BC by influencing TF-DNA interaction and provide critical insights to pinpoint causal genetic variants.
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http://dx.doi.org/10.1002/mc.22902DOI Listing
December 2018

Immunogenicity and Safety of an F-Genotype Attenuated Mumps Vaccine in Healthy 8- to 24-Month-Old Children.

J Infect Dis 2019 01;219(1):50-58

Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.

Background: Mumps vaccine immunizations have reduced the incidence of this disease. With the variation of mumps circulating strain, novel vaccine strains are always important.

Methods: A 2-center parallel, randomized, double-blind noninferiority trial was performed to compare an F-genotype attenuated mumps vaccine (SP strain) to the A-genotype vaccine (S-79, Jeryl-Lynn strain) in 1080 healthy children aged 8-24 months in Hubei, China.

Results: Participants were randomly assigned to receive a high or low dose of the SP or S79 vaccine and then assessed clinically at 30 minutes and 1-28 days postinoculation. No differences in local or systemic reactivity were observed. A similar incidence of severe adverse events associated with the vaccine was observed in the high-dose group and the positive control group. Based on throat swab collections, no viral shedding was present at the 4th and 10th days in any group. Neutralizing and hemagglutination-inhibiting antibody assays with the F- or A-genotype strains showed similar trends in geometric mean titers in the high-dose SP and S79 groups. Increased cytotoxic T lymphocyte responses were observed in all groups.

Conclusions: The F-genotype attenuated mumps vaccine is safe, offers immunogenicity against a homologous virus, and is noninferior to the A-genotype vaccine in 8- to 24-month-old children.
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http://dx.doi.org/10.1093/infdis/jiy469DOI Listing
January 2019

Root growth and spatial distribution characteristics for seedlings raised in substrate and transplanted cotton.

PLoS One 2017 22;12(12):e0190032. Epub 2017 Dec 22.

Institute of Cotton Research of the Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, Henan, P.R. China.

In this study, transplanting cotton seedlings grown in artificial substrate is considered due to recent increased interest in cotton planting labor saving approaches. The nursery methods used for growing cotton seedlings affect root growth. However, the underlying functional responses of root growth to variations in cotton seedling transplanting methods are poorly understood. We assessed the responses of cotton (Gossypium hirsutum L.) roots to different planting methods by conducting cotton field experiments in 2012 and 2013. A one-factor random block design was used with three replications and three different cotton planting patterns (substrate seedling transplanted cotton (SSTC), soil-cube seedling transplanted cotton (ScSTC) and directly sown cotton (DSC). The distributions and variances of the root area density (RAD) and root length density (RLD) at different cotton growing stages and several yield components were determined. Overall, the following results were observed: 1) The RAD and RLD were greatest near the plants (a horizontal distance of 0 cm) but were lower at W20 and W40 cm in the absence of film mulching than at E20 and E40 cm with film mulching. 2) The roots were confined to shallow depths (20-40 cm), and the root depths of SSTC and DSC were greater than the root depths of ScSTC. 3) Strong root growth was observed in the SSTC at the cotton flowering and boll setting stages. In addition, early onset root growth occurred in the ScSTC, and vigorous root growth occurred throughout all cotton growth stages in DSC. 4) The SSTC plants had more lateral roots with higher root biomass (RB) than the ScSTC, which resulted in higher cotton yields. However, the early onset root growth in the ScSTC resulted in greater pre-frost seed cotton (PFSC) yields. These results can be used to infer how cotton roots are distributed in soils and capture nutrients.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0190032PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741230PMC
January 2018

Study on Light Interception and Biomass Production of Different Cotton Cultivars.

PLoS One 2016 26;11(5):e0156335. Epub 2016 May 26.

Institute of Cotton Research of Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China.

Identifying the characteristics of light interception and utilization is of great significance for improving the potential photosynthetic activity of plants. The present research investigates the differences in absorbing and converting photosynthetically active radiation (PAR) among various cotton cultivars. Field experiments were conducted in 2012, 2013 and 2014 in Anyang, Henan, China. Ten cultivars with different maturity and plant architectures were planted at a density of 60,000 plants ha-1 in randomized blocks, with three replicates. The spatial distribution of light in canopy was measured and quantified with a geo-statistical method, according to which the cumulative amount of intercepted radiation was calculated by Simpson 3/8 rules. Finally, light interception was analyzed in association with the biomass accumulation of different cultivars. The key results were: (1) late-maturing varieties with an incompact plant architecture captured more solar radiation throughout the whole growth period than middle varieties with columnar architecture and even more than early varieties with compact architecture, and they produced more biomass; (2) the highest PAR interception ratio and the maximum biomass accumulation rate occurred during the blossoming and boll-forming stage, when leaf area index (LAI) reached its peak; (3) the distribution within the canopy presented a significant spatial heterogeneity, and at late growing stage, the PAR was mainly intercepted by upper canopies in incompact-type plant communities, but was more homogeneous in columnar-type plants; however, the majority of radiation was transmitted through the canopy in compact-type colonies; (4) there was not a consistent variation relationship between the cumulative intercepted PAR (iPAR) and biomass among these cultivars over the three years of the study. Based on these results, we attempted to clarify the distinction in light spatial distribution within different canopies and the patterns of PAR interception in diverse cotton cultivars with different hereditary characters, thereby providing a significant basis for researchers to select cultivars with appropriate growth period and optimal plant architecture for improvement of light interception and utilization.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0156335PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882027PMC
July 2017

Light spatial distribution in the canopy and crop development in cotton.

PLoS One 2014 19;9(11):e113409. Epub 2014 Nov 19.

Institute of Cotton Research of the Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, 455000, Henan, China.

The partitioning of light is very difficult to assess, especially in discontinuous or irregular canopies. The aim of the present study was to analyze the spatial distribution of photosynthetically active radiation (PAR) in a heterogeneous cotton canopy based on a geo-statistical sampling method. Field experiments were conducted in 2011 and 2012 in Anyang, Henan, China. Field plots were arranged in a randomized block design with the main plot factor representing the plant density. There were 3 replications and 6 densities used in every replicate. The six plant density treatments were 15,000, 33,000, 51,000, 69,000, 87,000 and 105,000 plants ha(-1). The following results were observed: 1) transmission within the canopy decreased with increasing density and significantly decreased from the top to the bottom of the canopy, but the greatest decreases were observed in the middle layers of the canopy on the vertical axis and closing to the rows along the horizontal axis; 2) the transmitted PAR (TPAR) of 6 different cotton populations decreased slowly and then increased slightly as the leaves matured, the TPAR values were approximately 52.6-84.9% (2011) and 42.7-78.8% (2012) during the early cotton developmental stage, and were 33.9-60.0% (2011) and 34.5-61.8% (2012) during the flowering stage; 3) the Leaf area index (LAI) was highly significant exponentially correlated (R(2) = 0.90 in 2011, R(2) = 0.91 in 2012) with the intercepted PAR (IPAR) within the canopy; 4) and a highly significant linear correlation (R(2) = 0.92 in 2011, R(2) = 0.96 in 2012) was observed between the accumulated IPAR and the biomass. Our findings will aid researchers to improve radiation-use efficiency by optimizing the ideotype for cotton canopy architecture based on light spatial distribution characteristics.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0113409PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4237451PMC
December 2015

Genetic variations in the TGFβ signaling pathway, smoking and risk of colorectal cancer in a Chinese population.

Carcinogenesis 2013 Apr 28;34(4):936-42. Epub 2012 Dec 28.

Department of Epidemiology and Biostatistics, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Recent genome-wide association studies (GWAS) have reported multiple risk loci associated with risk of colorectal cancer (CRC), some of which are involved in the transforming growth factor beta (TGFβ) signaling pathway. We systematically examined associations of common genetic variations in the TGFβ signaling pathway and environmental factors with CRC risk using a two-staged case-control study in a Chinese population. A set of 77 single-nucleotide polymorphisms (SNPs) in 10 candidate genes involved in the TGFβ signaling pathway and several environmental factors including sex, age, smoking and drinking were examined by random forest (RF) to capture the potential gene-gene and gene-environment interactions in stage 1 of the study with 443 CRC patients and 480 controls. Three promising SNPs (SMAD7 rs11874392, TGFBR1 rs10988706 and rs6478972) selected by the RF method were genotyped in stage 2 comprising 351 cases and 360 controls for validation. SMAD7 rs11874392 presented consistently significant associations with a risk of CRC at both stages, with odds ratio = 1.41 (95% confidence interval = 1.21-1.63) using additive modes in combined analyses. Moreover, the potential interactions between SMAD7 rs11874392, TGFBR1 rs10988706 and rs6478972 were indicated consistently in both stages of the study by using pair-wise interaction and multilocus genotype pattern analysis. Additionally, gene-smoking interactions for rs11874392, rs10988706 and rs6478972 were also found to enhance the risk of CRC at both stages, with P for multiplicative interaction equal to 1.162×10(-6), 8.574×10(-8) and 9.410×10(-8) in combined analyses, respectively. This study emphasized the substantial role of the TGFβ signaling pathway in CRC, especially in interaction with smoking.
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http://dx.doi.org/10.1093/carcin/bgs395DOI Listing
April 2013

Meta-analysis of the association between DCDC2 polymorphisms and risk of dyslexia.

Mol Neurobiol 2013 Feb 11;47(1):435-42. Epub 2012 Dec 11.

Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Developmental dyslexia (DD) is a highly heritable neurological disorder that is prevalent in school-aged children. The dyslexia-associated gene DCDC2 is a member of the DCX family of genes known to play roles in neurogenesis, neuronal migration, and differentiation. However, the associations between DCDC2 genetic variations and dyslexia have yielded inconclusive results. Clarifying the effects of DCDC2 polymorphisms on dyslexia risk will advance not only elucidation of the role of DCDC2 in the brain development but also development of possible therapeutic approach for dyslexia. In this review, we summarized the ongoing association studies concerning DCDC2 polymorphisms and dyslexia risk by using meta-analysis and revealed that DCDC2 rs807701 might contribute significantly to dyslexia risk.
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http://dx.doi.org/10.1007/s12035-012-8381-7DOI Listing
February 2013

Multi-loci analysis reveals the importance of genetic variations in sensitivity of platinum-based chemotherapy in non-small-cell lung cancer.

Mol Carcinog 2013 Dec 20;52(12):923-31. Epub 2012 Jul 20.

Department of Epidemiology and Biostatistics, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Polymorphisms in DNA repair and apoptotic pathways may cause variations in chemosensitivity of non-small-cell lung cancer (NSCLC) through complex gene-gene and gene-environment interactions. A total of 200 advanced NSCLC patients who received platinum-based chemotherapies were recruited. The short-term clinical outcomes were classified as chemosensitive group, including complete remission (CR) and partial remission (PR), and chemoresistant group, namely stable disease (SD) and progression disease (PD) at the end of treatment. We applied multifactor dimensionality reduction (MDR), classification and regression tree (CART) and traditional logistic regression (LR) to explore high-order gene-gene and gene-environment interactions among 11 functional single nucleotide polymorphisms (SNPs), smoking status, cancer stages and treatment regimens in the response to chemotherapy. Multi-loci analyses consistently indicated that interactions among XRCC1 Arg194Trp, XPC PAT, FAS G-1377A, and FASL T-844C were associated with sensitivity to platinum-based chemotherapy. In MDR analysis, the four-factor model yielded the highest test accuracy of 0.72 (permutation P = 0.001). In CART analysis, these four SNPs were the determinant nodes of the growth of regression tree. Patients carrying XRCC1 Arg194Arg, FAS-1377GG, and FASL-844T allele displayed completely no response to platinum, whereas patients with XRCC1 194Trp allele and XPC PAT +/+ had 68.8% response rate to platinum. In LR analysis, a significant gene-dosage effect was detected along with the increasing number of favorable genotypes of these four polymorphisms (P trend = 0.00002). Multi-loci analysis reveals the importance of genetic variations involved in DNA repair and apoptotic pathways in sensitivity of platinum-based chemotherapy in NSCLC.
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http://dx.doi.org/10.1002/mc.21942DOI Listing
December 2013

Synthesis of Ag/ZnO nanorods array with enhanced photocatalytic performance.

J Hazard Mater 2010 Oct 8;182(1-3):123-9. Epub 2010 Jun 8.

CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China.

Silver-modified ZnO nanorods array has been prepared and the effect of silver modification has been studied. ZnO nanorods array were fabricated through a wet chemical route and a photo deposition method was taken to fabricate silver nano particulate on the ZnO nanorods. The structural and optical properties were characterized by field emission scanning electron microscope, high resolution transmission electron microscope, X-ray photoelectron spectroscopy, Raman, UV-vis and photoluminescence (PL) spectra. The UV photocatalytic activity of these materials was studied by analyzing the degradation of methylene blue (MB) in aqueous solution. The photocatalytic performance indicated that Ag deposit acted as not only electron sinks to enhance the separation of photoexcited electrons from holes, but also charge carrier recombination centers, so the optimized amount of Ag deposit was investigated.
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http://dx.doi.org/10.1016/j.jhazmat.2010.05.141DOI Listing
October 2010

Morphology-controlled synthesis of flowerlike ZnO nano/microstructures and their photocatalytic property.

J Nanosci Nanotechnol 2009 Mar;9(3):2038-44

Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China.

Flowerlike ZnO nano/microstructures (FZNM) have been synthesized on glass substrates by a simple hydrothermal method. The as-prepared samples are composed of many radially oriented nano/submicron rods, which are single crystalline with a hexagonal structure and grow along the [001] direction. The diameter of ZnO nano/submicron rods ranges from 20 nm to 1 microm. With prolonged reaction time, the number of the nano/submicron rods of each ZnO flowerlike will decrease, while further prolonged reaction time, the amount increase actually. The reaction time is one key factor to control the sizes of the rods and the morphology of flowerlike structures. The possible growth mechanism has been discussed and proposed. A preliminary study on photocatalytic property of as-synthesized flowerlike structure reveals that morphology and size significantly influenced the photocatalytic activity for a solution of methylene blue (MB). Moreover, it is found that the annealed product exhibited higher photocatalytic performance.
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http://dx.doi.org/10.1166/jnn.2009.392DOI Listing
March 2009

Photoluminescence investigation based on laser heating effect in ZnO-ordered nanostructures.

J Phys Chem B 2006 Jan;110(2):846-52

Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China.

We synthesized ZnO-SiO2 composite opal and ZnO inverse opal by electrodeposition using SiO2-opal template and polystyrene (PS)-opal template, respectively. Compared with compact ZnO nanocrystal film also prepared by electrodeposition, ordered ZnO nanostructures exhibit more significant red-shift and broadening of the UV peak with increasing excitation power, which is due to a stronger local heating effect in ordered ZnO nanostructures. We developed a quantitative analytical method to investigate photoluminescence (PL) of ZnO based on laser heating effects. The experimental data agree well with fitting curves derived from the electron-phonon interaction model. Important parameters, such as electron-phonon coupling strength and thermal activation energy, can be obtained by fitting experimental data. The resonant Raman spectra provide further evidence that the analyses based on laser heating effects are feasible.
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http://dx.doi.org/10.1021/jp055757xDOI Listing
January 2006
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