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https://www.readbyqxmd.com/read/27666893/spectroscopic-properties-of-phase-pure-and-polytypic-colloidal-semiconductor-quantum-wires
#1
Fudong Wang, Richard A Loomis, William E Buhro
We report ensemble extinction and photoluminesence spectra for colloidal CdTe quantum wires (QWs) with nearly phase-pure, defect-free wurtzite (WZ) structure, having spectral line widths comparable to the best ensemble or single quantum-dot values, to the single polytypic (having WZ and zinc blende (ZB) alternations) QW values, and to those of two-dimensional quantum belts or platelets. The electronic structures determined from the multifeatured extinction spectra are in excellent agreement with the theoretical results of WZ QWs having the same crystallographic orientation...
September 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27512257/zhoubo-plus-uncaria-tincture-in-the-treatment-of-cerebral-concussion-sequelae
#2
Jianjun Liang, Ying Wang, Beicheng Liang
[Purpose] This study investigated the clinical efficacy of the compound gouteng tincture combined with Zhoubo (GT-ZB) in treating the sequelae of cerebral concussion (CC) in children. [Subjects and Methods] Sixty children with CC-sequelae were randomily divided into a treatment group and a control group, with 30 cases in each group. The treatment group was treated using GT-ZB, and the control group was treated using the standard method of venoruton, dibazol, and Vitamin B6. The efficacies of the two treatments were compared...
July 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/26626507/analyses-of-the-molecular-mechanisms-associated-with-silk-production-in-silkworm-by-itraq-based-proteomics-and-rna-sequencing-based-transcriptomics
#3
Shaohua Wang, Zhengying You, Mao Feng, Jiaqian Che, Yuyu Zhang, Qiujie Qian, Setsuko Komatsu, Boxiong Zhong
Silkworm is used as a model organism to analyze two standard complex traits, which are high and low silk yields. To understand the molecular mechanisms of silk production, the posterior silk glands aged to the third day of the fifth instar were analyzed from the ZB strain with low silk production and from the control strain Lan10. Using isobaric tags for relative and absolute quantification (iTRAQ) quantitative shotgun proteomics and RNA-sequencing-based transcriptomics, 139 proteins and 630 transcripts were identified as novel in the ZB strain compared with the Lan10 strain, indicating that these results significantly expand the coverage of proteins and transcripts of the posterior silk glands in the silkworm...
January 4, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/26371967/zn-dopant-dependent-defect-evolution-in-gan-nanowires
#4
Bing Yang, Baodan Liu, Yujia Wang, Hao Zhuang, Qingyun Liu, Fang Yuan, Xin Jiang
Zn doped GaN nanowires with different doping levels (0, <1 at%, and 3-5 at%) have been synthesized through a chemical vapor deposition (CVD) process. The effect of Zn doping on the defect evolution, including stacking fault, dislocation, twin boundary and phase boundary, has been systematically investigated by transmission electron microscopy and first-principles calculations. Undoped GaN nanowires show a hexagonal wurtzite (WZ) structure with good crystallinity. Several kinds of twin boundaries, including (101¯3), (101¯1) and (202¯1), as well as Type I stacking faults (…ABABCBCB…), are observed in the nanowires...
October 21, 2015: Nanoscale
https://www.readbyqxmd.com/read/26125338/plasmonic-zitterbewegung-in-binary-graphene-sheet-arrays
#5
Yang Fan, Bing Wang, He Huang, Kai Wang, Hua Long, Peixiang Lu
We theoretically investigate the plasmonic Zitterbewegung (ZB) effect in binary graphene sheet arrays (GSAs). The surface plasmon polariton (SPP) modes of two minibands are realized by alternately varying the chemical potentials of individual graphene sheets in the arrays. Numerical simulations show that SPPs in the array experience characteristic trembling motion. The oscillating periods of the plasmonic ZB are strongly dependent on the propagation constant mismatch and varied in the range of micrometer, while the amplitude reaches tens of nanometers, making the ZB effect easier to be observed in practice...
July 1, 2015: Optics Letters
https://www.readbyqxmd.com/read/25559370/sb-induced-phase-control-of-inassb-nanowires-grown-by-molecular-beam-epitaxy
#6
Q D Zhuang, Ezekiel A Anyebe, R Chen, H Liu, Ana M Sanchez, Mohana K Rajpalke, Tim D Veal, Z M Wang, Y Z Huang, H D Sun
For the first time, we report a complete control of crystal structure in InAs(1-x)Sb(x) NWs by tuning the antimony (Sb) composition. This claim is substantiated by high-resolution transmission electron microscopy combined with photoluminescence spectroscopy. The pure InAs nanowires generally show a mixture of wurtzite (WZ) and zinc-blende (ZB) phases, where addition of a small amount of Sb (∼2-4%) led to quasi-pure WZ InAsSb NWs, while further increase of Sb (∼10%) resulted in quasi-pure ZB InAsSb NWs. This phase transition is further evidenced by photoluminescence (PL) studies, where a dominant emission associated with the coexistence of WZ and ZB phases is present in the pure InAs NWs but absent in the PL spectrum of InAs0...
February 11, 2015: Nano Letters
https://www.readbyqxmd.com/read/25386556/genomic-changes-in-an-attenuated-zb-strain-of-foot-and-mouth-disease-virus-serotype-asia1-and-comparison-with-its-virulent-parental-strain
#7
Aiguo Xin, Mingwang Zhu, Zhenqi Peng, Qi Hu, Chenhong Shi, Defang Liao, Jihua Wang, Huachun Li
The molecular basis of attenuation of foot-and-mouth disease virus (FMDV) serotype Asia1 ZB strain remains unknown. To understand the genetic changes of attenuation, we compared the entire genomes of three different rabbit-passaged attenuated ZB strains (ZB/CHA/58(att), ZBRF168, and ZBRF188) and their virulent parental strains (ZBCF22 and YNBS/58). The results showed that attenuation may be brought about by 28 common amino acid substitutions in the coding region, with one nucleotide point mutation in the 5'-untranslated region (5'-UTR) and another one in the 3'-UTR...
2014: International Journal of Genomics
https://www.readbyqxmd.com/read/25382815/carrier-thermalization-dynamics-in-single-zincblende-and-wurtzite-inp-nanowires
#8
Yuda Wang, Howard E Jackson, Leigh M Smith, Tim Burgess, Suriati Paiman, Qiang Gao, Hark Hoe Tan, Chennupati Jagadish
Using transient Rayleigh scattering (TRS) measurements, we obtain photoexcited carrier thermalization dynamics for both zincblende (ZB) and wurtzite (WZ) InP single nanowires (NW) with picosecond resolution. A phenomenological fitting model based on direct band-to-band transition theory is developed to extract the electron-hole-plasma density and temperature as a function of time from TRS measurements of single nanowires, which have complex valence band structures. We find that the thermalization dynamics of hot carriers depends strongly on material (GaAs NW vs InP NW) and less strongly on crystal structure (ZB vs WZ)...
December 10, 2014: Nano Letters
https://www.readbyqxmd.com/read/25114504/the-load-and-release-characteristics-on-a-strong-cationic-ion-exchange-fiber-kinetics-thermodynamics-and-influences
#9
Jing Yuan, Yanan Gao, Xinyu Wang, Hongzhuo Liu, Xin Che, Lu Xu, Yang Yang, Qifang Wang, Yan Wang, Sanming Li
Ion-exchange fibers were different from conventional ion-exchange resins in their non-cross-linked structure. The exchange was located on the surface of the framework, and the transport resistance reduced significantly, which might mean that the exchange is controlled by an ionic reaction instead of diffusion. Therefore, this work aimed to investigate the load and release characteristics of five model drugs with the strong cationic ion-exchange fiber ZB-1. Drugs were loaded using a batch process and released in United States Pharmacopoeia (USP) dissolution apparatus 2...
2014: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/24968071/reversal-of-muscle-atrophy-by-zhimu-huangbai-herb-pair-via-akt-mtor-foxo3-signal-pathway-in-streptozotocin-induced-diabetic-mice
#10
Jinbao Zhang, Pengwei Zhuang, Yan Wang, Lili Song, Mixia Zhang, Zhiqiang Lu, Lu Zhang, Jing Wang, Paulos N Alemu, Yanjun Zhang, Hongjun Wei, Hongyan Li
Skeletal muscle atrophy is one of the serious complications of diabetes. Zhimu-Huangbai herb-pair (ZB) is widely used in Chinese traditional medicine formulas for treating Xiaoke (known as diabetes) and its complications. However, the effect of ZB on reversal of muscle atrophy and the underlying mechanisms remain unknown. In this research, we investigated the effect and possible mechanisms of ZB on skeletal muscle atrophy in diabetic mice. Animal model of diabetic muscle atrophy was developed by high fat diet (HFD) feeding plus streptozotocin (STZ) injection...
2014: PloS One
https://www.readbyqxmd.com/read/24954555/single-crystalline-wurtzite-zno-zinc-blende-zns-coaxial-heterojunctions-and-hollow-zinc-blende-zns-nanotubes-synthesis-structural-characterization-and-optical-properties
#11
Xing Huang, Marc-Georg Willinger, Hua Fan, Zai-lai Xie, Lei Wang, Achim Klein-Hoffmann, Frank Girgsdies, Chun-Sing Lee, Xiang-Min Meng
Synthesis of ZnO/ZnS heterostructures under thermodynamic conditions generally results in the wurtzite (WZ) structure of the ZnS component because its WZ phase is thermodynamically more stable than its zinc blende (ZB) phase. In this report, we demonstrate for the first time the preparation of ZnO/ZnS coaxial nanocables composed of single crystalline ZB structured ZnS epitaxially grown on WZ ZnO via a two-step thermal evaporation method. The deposition temperature is believed to play a crucial role in determining the crystalline phase of ZnS...
August 7, 2014: Nanoscale
https://www.readbyqxmd.com/read/24882038/oral-sustained-release-suspension-based-on-a-novel-taste-masked-and-mucoadhesive-carrier-ion-exchange-fiber
#12
Jing Yuan, Tiaotiao Liu, Heran Li, Tianyu Shi, Jie Xu, Hongzhuo Liu, Zhiguo Wang, Qifang Wang, Lu Xu, Yan Wang, Sanming Li
The purpose of this study was to evaluate the feasibility of ion-exchange fiber ZB-1 as a novel carrier in oral taste-masked mucoadhesive sustained-release suspensions. Propranolol (PPN) hydrochloride was selected as a model drug with good water solubility, short half life and bitter taste. The PPN-fiber complexes (PF) were prepared by a batch process and coated with Eudragit(®) RS100. Gamma scintigraphy was performed on fasted volunteers revealed about 30% ZB-1 and more than 50% coated ZB-1 were still remaining in the stomach at 6h...
September 10, 2014: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/24841046/dual-drug-load-and-release-behavior-on-ion-exchange-fiber-influencing-factors-and-prediction-method-for-precise-control-of-the-loading-amount
#13
Jing Yuan, Yanan Gao, Tiaotiao Liu, Xinyu Wang, Hongzhuo Liu, Sanming Li
Ion-exchange fiber undergoes a stoichiometric exchange reaction and has large exchange capability, which makes it a promising candidate as a multiple drug carrier. Because combinatorial effects can act synergistically, additively or antagonistically depending on the ratio of the agents being combined, the objective of this study was to learn the dual drug loading of ion-exchange fiber and develop a mathematical method for precisely control of the loading amount. Atenolol and Gatifloxacin, with different loading behaviors into strong cationic ion-exchange fiber ZB-1, were used to build a representative of dual loading...
2015: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/24535970/determination-of-polarization-fields-across-polytype-interfaces-in-inas-nanopillars
#14
Luying Li, Zhaofeng Gan, Martha R McCartney, Hanshuang Liang, Hongbin Yu, Wan-Jian Yin, Yanfa Yan, Yihua Gao, Jianbo Wang, David J Smith
Polarization fields within InAs nanopillars with zincblende(ZB)/wurtzite(WZ) polytype stacking are quantified. The displacement of charged ions inside individual tetrahedra of WZ regions is measured at the atomic scale. The variations of spontaneous polarization along the interface normal are related to strain at interfaces of different polytypes. Thus, direct correlation between local atomic structure and electric properties is demonstrated.
February 2014: Advanced Materials
https://www.readbyqxmd.com/read/24428189/quantitative-proteomic-and-transcriptomic-analyses-of-molecular-mechanisms-associated-with-low-silk-production-in-silkworm-bombyx-mori
#15
Shao-Hua Wang, Zheng-Ying You, Lu-Peng Ye, Jiaqian Che, Qiujie Qian, Yohei Nanjo, Setsuko Komatsu, Bo-Xiong Zhong
To investigate the molecular mechanisms underlying the low fibroin production of the ZB silkworm strain, we used both SDS-PAGE-based and gel-free-based proteomic techniques and transcriptomic sequencing technique. Combining the data from two different proteomic techniques was preferable in the characterization of the differences between the ZB silkworm strain and the original Lan10 silkworm strain. The correlation analysis showed that the individual protein and transcript were not corresponded well, however, the differentially changed proteins and transcripts showed similar regulated direction in function at the pathway level...
February 7, 2014: Journal of Proteome Research
https://www.readbyqxmd.com/read/24274356/dynamic-process-of-phase-transition-from-wurtzite-to-zinc-blende-structure-in-inas-nanowires
#16
He Zheng, Jian Wang, Jian Yu Huang, Jianbo Wang, Ze Zhang, Scott X Mao
In situ high-resolution transmission electron microscopy revealed the precipitation of the zinc-blende (ZB) structure InAs at the liquid/solid interface or liquid/solid/amorphous carbon triple point at high temperature. Subsequent to its precipitation, detailed analysis demonstrates unique solid to solid wurtzite (WZ) to ZB phase transition through gliding of sharp steps with Shockley partial dislocations. The most intriguing phenomenon was that each step is 6 {111} atomic layers high and the step migrated without any mechanical stress applied...
2013: Nano Letters
https://www.readbyqxmd.com/read/24116770/decoding-the-riddle-of-y-4260-and-zc-3900
#17
Qian Wang, Christoph Hanhart, Qiang Zhao
The observation of Zc(3900) by the BESIII Collaboration in the invariant mass spectrum of J/ψπ± in e+e-→J/ψπ+π- at the center of mass 4.260 GeV suggests the existence of a charged DD*+DD* molecular state with I(JP)=1(1+), which could be an isovector brother of the famous X(3872) and an analogue of Zb(10610) claimed by the Belle Collaboration. We demonstrate that this observation provides strong evidence that the mysterious Y(4260) is a DD1(2420)+DD1(2420) molecular state. Especially, we show that the decay of this molecule naturally populates low momentum DD* pairs and leads unavoidably to a cusp at the DD* threshold...
September 27, 2013: Physical Review Letters
https://www.readbyqxmd.com/read/23517546/all-zinc-blende-gaas-ga-mn-as-core-shell-nanowires-with-ferromagnetic-ordering
#18
Xuezhe Yu, Hailong Wang, Dong Pan, Jianhua Zhao, Jennifer Misuraca, Stephan von Molnár, Peng Xiong
Combining self-catalyzed vapor-liquid-solid growth of GaAs nanowires and low-temperature molecular-beam epitaxy of (Ga,Mn)As, we successfully synthesized all zinc-blende (ZB) GaAs/(Ga,Mn)As core-shell nanowires on Si(111) substrates. The ZB GaAs nanowire cores are first fabricated at high temperature by utilizing the Ga droplets as the catalyst and controlling the triple phase line nucleation, then the (Ga,Mn)As shells are epitaxially grown on the side facets of the GaAs core at low temperature. The growth window for the pure phase GaAs/(Ga,Mn)As core-shell nanowires is found to be very narrow...
April 10, 2013: Nano Letters
https://www.readbyqxmd.com/read/23171521/large-scale-and-uniform-preparation-of-pure-phase-wurtzite-gaas-nws-on-non-crystalline-substrates
#19
Ning Han, Jared J Hou, Fengyun Wang, Senpo Yip, Hao Lin, Ming Fang, Fei Xiu, Xiaoling Shi, Takfu Hung, Johnny C Ho
One of the challenges to prepare high-performance and uniform III-V semiconductor nanowires (NWs) is to control the crystal structure in large-scale. A mixed crystal phase is usually observed due to the small surface energy difference between the cubic zincblende (ZB) and hexagonal wurtzite (WZ) structures, especially on non-crystalline substrates. Here, utilizing Au film as thin as 0.1 nm as the catalyst, we successfully demonstrate the large-scale synthesis of pure-phase WZ GaAs NWs on amorphous SiO2/Si substrates...
2012: Nanoscale Research Letters
https://www.readbyqxmd.com/read/22298439/polarization-induced-charge-distribution-at-homogeneous-zincblende-wurtzite-heterostructural-junctions-in-znse-nanobelts
#20
Luying Li, Lei Jin, Jianbo Wang, David J Smith, Wan-Jian Yin, Yanfa Yan, Hongqian Sang, Wallace C H Choy, Martha R McCartney
Homogeneous heterostructural wurtzite (WZ)/zincblende (ZB) junctions are successfully fabricated in ZnSe nanobelts. Polarity continuity across the ZB/WZ interface is demonstrated. The saw-tooth-like potential profile induced by spontaneous polarization across the WZ/ZB/WZ interfaces is identified directly at the nanoscale. The polarization-induced charge distribution across the homogeneous heterostructural interfaces is proposed as a viable alternative approach towards charge tailoring in semiconductor nanostructures...
March 8, 2012: Advanced Materials
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