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Nanoscale Research Letters

Zhi Zhang, Wenfei Shen, Jing Xue, Yuanmeng Liu, Yanwei Liu, Peipei Yan, Jixian Liu, Jianguo Tang
As the advanced functional materials, silver nanoparticles are potentially useful in various fields such as photoelectric, bio-sensing, catalysis, antibacterial and other fields, which are mainly based on their various properties. However, the properties of silver nanoparticles are usually determined by their size, shape, and surrounding medium, which can be modulated by various synthesis methods. In this review, the fabrication methods for synthesizing silver nanoparticles of different shapes and specific size are illustrated in detail...
February 18, 2018: Nanoscale Research Letters
Xiangyu Jiang, Pengbo Zhang, Juan Zhang, Jilei Wang, Gaofei Li, Xiaohong Fang, Liyou Yang, Xiaoyuan Chen
Hybrid heterojunction solar cells (HHSCs) have gained extensive research and attention due to simple device structure and low-cost technological processes. Here, HHSCs are presented based on a highly transparent conductive polymer poly(3,4ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) directly spin-coated on an n-type crystalline silicon with microscale surface textures, which are prepared by traditional chemical etching. We have studied interface properties between PEDOT:PSS and textured n-Si by varying coating conditions...
February 14, 2018: Nanoscale Research Letters
Shahnaz Akhtar, Wenzhen An, Xiaoying Niu, Kang Li, Shahzad Anwar, Khan Maaz, Muhammad Maqbool, Lan Gao
In this work, CoFe 2 O 4 nanoparticles coated with polyethylene glycol (PEG) were successfully synthesized via a hydrothermal technique. Morphological studies of the samples confirmed the formation of polycrystalline pure-phase PEG-CoFe 2 O 4 nanoparticles with sizes of about 24 nm. Toxicity induced by CoFe 2 O 4 nanoparticles was investigated, and biological assays were performed to check the toxicity effects of CoFe 2 O 4 nanoparticles. Moreover, the healing effect of toxicity induced in living organisms was studied using curcumin and it was found that biochemical indexes detoxified and improved to reach its normal level after curcumin administration...
February 14, 2018: Nanoscale Research Letters
Aihua Zhong, Ping Fan, Yuanting Zhong, Dongping Zhang, Fu Li, Jingting Luo, Yizhu Xie, Kazuhiro Hane
Structure shift of GaN nanowall network, nanocolumn, and compact film were successfully obtained on Si (111) by plasma-assisted molecular beam epitaxy (MBE). As is expected, growth of the GaN nanocolumns was observed in N-rich condition on bare Si, and the growth shifted to compact film when the Ga flux was improved. Interestingly, if an aluminum (Al) pre-deposition for 40 s was carried out prior to the GaN growth, GaN grows in the form of the nanowall network. Results show that the pre-deposited Al exits in the form of droplets with typical diameter and height of ~ 80 and ~ 6...
February 13, 2018: Nanoscale Research Letters
Yinkai Yu, Shaohua Qu, Duyang Zang, Liuding Wang, Hongjing Wu
Usually, we must use an appropriate support material to keep the metal species stable and finely dispersed as supported metal nanoparticles for industry application. Therefore, the choice of support material is a key factor in determining the dispersion and particle size of the noble metal species. Here, we report the synthesis of a single-atom Pt material in the solution and supported Pt nanoclusters on microporous La2O3 by a one-step acoustic levitation method without any pretreatment/modification of raw oxide...
February 13, 2018: Nanoscale Research Letters
Shuangyue Wang, Hongwei Yan, Dengji Li, Liang Qiao, Shaobo Han, Xiaodong Yuan, Wei Liu, Xia Xiang, Xiaotao Zu
Dual-layer and tri-layer broadband antireflective (AR) films with excellent transmittance were successfully fabricated using base-/acid-catalyzed mixed sols and propylene oxide (PO) modified silica sols. The sols and films were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), transmission electron microscope (TEM), and scanning transmission electron microscope (STEM). FTIR and TEM results suggest that the PO molecules were covalently bonded to the silica particles and the bridge structure existing in PO modified silica sol is responsible for the low density of the top layer...
February 12, 2018: Nanoscale Research Letters
Hatem A Mahmoud, Katabathini Narasimharao, Tarek T Ali, Kamal M S Khalil
TiO2 nanoparticles were synthesized from titanium isopropoxide by a simple peptization method using sulfuric, nitric, and acetic acids. The effect of peptizing acid on physicochemical and photocatalytic properties of TiO2 powders was studied. The structural properties of synthesized TiO2 powders were analyzed by using XRD, TEM, N2-physisorption, Raman, DR UV-vis, FTIR, and X-ray photoelectron spectroscopy techniques. The characterization results showed that acetic acid peptization facilitated the formation of pure anatase phase after thermal treatment at 500 °C; in contrast, nitric acid peptization led to a major rutile phase formation (67%)...
February 9, 2018: Nanoscale Research Letters
Mei Wang, Ai-Dong Li, Ji-Zhou Kong, You-Pin Gong, Chao Zhao, Yue-Feng Tang, Di Wu
ZnO nano-clips with better monodispersion were prepared successfully using zinc acetate hydrate (Zn(OAc)2·nH2O) as Zn source and ethylene glycol (EG) as solvent by a simple solution-based route-polyol process. The effect of solution concentration on the formation of ZnO nano-clips has been investigated deeply. We first prove that the 0.01 M Zn(OAc)2·nH2O can react with EG without added water or alkaline, producing ZnO nano-clips with polycrystalline wurtzite structure at 170 °C. As-synthesized ZnO nano-clips contain a lot of aggregated nanocrystals (~ 5 to 15 nm) with high specific surface area of 88 m2/g...
February 9, 2018: Nanoscale Research Letters
C Tudisco, M T Cambria, A E Giuffrida, F Sinatra, C D Anfuso, G Lupo, N Caporarello, A Falanga, S Galdiero, V Oliveri, C Satriano, G G Condorelli
A versatile synthetic route based on magnetic Fe3O4 nanoparticle (MNP) prefunctionalization with a phosphonic acid monolayer has been used to covalently bind the gH625 peptide on the nanoparticle surface. gH625 is a membranotropic peptide capable of easily crossing the membranes of various cells including the typical human blood-brain barrier components. A similar synthetic route was used to prepare another class of MNPs having a functional coating based on PEG, rhodamine, and folic acid, a well-known target molecule, to compare the performance of the two cell-penetrating systems (i...
February 7, 2018: Nanoscale Research Letters
Alyona Sukhanova, Svetlana Bozrova, Pavel Sokolov, Mikhail Berestovoy, Alexander Karaulov, Igor Nabiev
Studies on the methods of nanoparticle (NP) synthesis, analysis of their characteristics, and exploration of new fields of their applications are at the forefront of modern nanotechnology. The possibility of engineering water-soluble NPs has paved the way to their use in various basic and applied biomedical researches. At present, NPs are used in diagnosis for imaging of numerous molecular markers of genetic and autoimmune diseases, malignant tumors, and many other disorders. NPs are also used for targeted delivery of drugs to tissues and organs, with controllable parameters of drug release and accumulation...
February 7, 2018: Nanoscale Research Letters
Zhong-Mei Huang, Wei-Qi Huang, Tai-Ge Dong, Gang Wang, Xue-Ke Wu
The Editor has retracted this article [1] due to significant overlap in text and figures with a previous article published in another journal [2]. The authors do not agree with the retraction.
February 7, 2018: Nanoscale Research Letters
Baoyun Ye, Chongwei An, Yuruo Zhang, Changkun Song, Xiaoheng Geng, Jingyu Wang
A one-step method which involves exfoliating graphite materials (GIMs) off into graphene materials (GEMs) in aqueous suspension of CL-20 and forming CL-20/graphene materials (CL-20/GEMs) composites by using ball milling is presented. The conversion of mixtures to composite form was monitored by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). The impact sensitivities of CL-20/GEM composites were contrastively investigated. It turned out that the energetic nanoscale composites based on CL-20 and GEMs comprising few layers were accomplished...
February 7, 2018: Nanoscale Research Letters
Zhi-Quan Huang, Wei-Chih Chen, Gennevieve M Macam, Christian P Crisostomo, Shin-Ming Huang, Rong-Bin Chen, Marvin A Albao, Der-Jun Jang, Hsin Lin, Feng-Chuan Chuang
The abounding possibilities of discovering novel materials has driven enhanced research effort in the field of materials physics. Only recently, the quantum anomalous hall effect (QAHE) was realized in magnetic topological insulators (TIs) albeit existing at extremely low temperatures. Here, we predict that MPn (M =Ti, Zr, and Hf; Pn =Sb and Bi) honeycombs are capable of possessing QAH insulating phases based on first-principles electronic structure calculations. We found that HfBi, HfSb, TiBi, and TiSb honeycomb systems possess QAHE with the largest band gap of 15 meV under the effect of tensile strain...
February 7, 2018: Nanoscale Research Letters
Aditya Prabaswara, Jung-Wook Min, Chao Zhao, Bilal Janjua, Daliang Zhang, Abdulrahman M Albadri, Ahmed Y Alyamani, Tien Khee Ng, Boon S Ooi
Consumer electronics have increasingly relied on ultra-thin glass screen due to its transparency, scalability, and cost. In particular, display technology relies on integrating light-emitting diodes with display panel as a source for backlighting. In this study, we undertook the challenge of integrating light emitters onto amorphous quartz by demonstrating the direct growth and fabrication of a III-nitride nanowire-based light-emitting diode. The proof-of-concept device exhibits a low turn-on voltage of 2.6 V, on an amorphous quartz substrate...
February 6, 2018: Nanoscale Research Letters
Gustavo G Parra, Lucimara P Ferreira, Pablo J Gonçalves, Svetlana V Sizova, Vladimir A Oleinikov, Vladimir N Morozov, Vladimir A Kuzmin, Iouri E Borissevitch
Interaction between porphyrins and quantum dots (QD) via energy and/or charge transfer is usually accompanied by reduction of the QD luminescence intensity and lifetime. However, for CdSe/ZnS-Cys QD water solutions, kept at 276 K during 3 months (aged QD), the significant increase in the luminescence intensity at the addition of meso-tetrakis (p-sulfonato-phenyl) porphyrin (TPPS4) has been observed in this study. Aggregation of QD during the storage provokes reduction in the quantum yield and lifetime of their luminescence...
February 5, 2018: Nanoscale Research Letters
Edgar O Owiti, Hanning Yang, Peng Liu, Calvine F Ominde, Xiudong Sun
Previous studies on hybrid dielectric-graphene metasurfaces have been used to implement induced transparency devices, while exhibiting high Q-factors based on trapped magnetic resonances. Typically, the transparency windows are single wavelength and less appropriate for polarization conversion structures. In this work, a quarter-wave plate based on a hybrid silicon-graphene metasurface with controllable birefringence is numerically designed. The phenomena of trapped magnetic mode resonance and high Q-factors are modulated by inserting graphene between silicon and silica...
February 3, 2018: Nanoscale Research Letters
Lin Jin, Long Wen, Li Liang, Qin Chen, Yunfei Sun
CMOS-compatible plasmonic modulators operating at the telecom wavelength are significant for a variety of on-chip applications. Relying on the manipulation of the transverse magnetic (TM) mode excited on the metal-dielectric interface, most of the previous demonstrations are designed to response only for specific polarization state. In this case, it will lead to a high polarization dependent loss, when the polarization-sensitive modulator integrates to a fiber with random polarization state. Herein, we propose a plasmonic modulator utilizing a metal-oxide indium tin oxide (ITO) wrapped around the silicon waveguide and investigate its optical modulation ability for both the vertical and horizontal polarized guiding light by tuning electro-absorption of ITO with the field-induced carrier injection...
February 3, 2018: Nanoscale Research Letters
Kaili Wang, Mengjiao Qi, Chunjing Guo, Yueming Yu, Bingjie Wang, Lei Fang, Mengna Liu, Zhen Wang, Xinxin Fan, Daquan Chen
In this work, novel mitochondrial and CD44 receptor dual-targeting redox-sensitive multifunctional nanoparticles (micelles) based on oligomeric hyaluronic acid (oHA) were proposed. The amphiphilic nanocarrier was prepared by (5-carboxypentyl)triphenylphosphonium bromide (TPP), oligomeric hyaluronic acid (oHA), disulfide bond, and curcumin (Cur), named as TPP-oHA-S-S-Cur. The TPP targeted the mitochondria, the antitumor drug Cur served as a hydrophobic core, the CD44 receptor targeting oHA worked as a hydrophilic shell, and the disulfide bond acted as a connecting arm...
February 2, 2018: Nanoscale Research Letters
Lingfeng Xiao, Tong Su, Zhuo Wang, Kun Zhang, Xiaoniu Peng, Yibo Han, Quan Li, Xina Wang
Ni2P has been decorated on CdS nanowires or nanorods for efficient photocatalytic H2 production, whereas the specific surface area remains limited because of the large size. Here, the composites of Cd0.5Zn0.5S quantum dots (QDs) on thin Ni2P porous nanosheets with high specific surface area were constructed for noble metal-free photocatalytic H2 generation. The porous Ni2P nanosheets, which were formed by the interconnection of 15-30 nm-sized Ni2P nanoparticles, allowed the uniform loading of 7 nm-sized Cd0...
February 2, 2018: Nanoscale Research Letters
Alice Chinghsuan Chang, Bernard Haochih Liu
The categorization of microbial strains is conventionally based on the molecular method, and seldom are the morphological characteristics in the bacterial strains studied. In this research, we revealed the macromolecular structures of the bacterial surface via AFM mechanical mapping, whose resolution was not only determined by the nanoscale tip size but also the mechanical properties of the specimen. This technique enabled the nanoscale study of membranous structures of microbial strains with simple specimen preparation and flexible working environments, which overcame the multiple restrictions in electron microscopy and label-enable biochemical analytical methods...
February 2, 2018: Nanoscale Research Letters
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