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《纳米研究》2017年第11期目录

NanoResearch

Nano Research


Contents


Mild metal-organic-gel route for synthesis of stable sub-5-nm metal-organic framework nanocrystals

Yue Qi, Chun-Ting He, Juntao Lin, Shuping Lin, Jin Liu,Jinghong Huang, Wei Xue, Guicheng Yu, Hsiu-Yi Chao,Yexiang Tong, and Zhengping Qiao*

Sun Yat-Sen University, China

By using a mild metal-organic-gel method, sub-5 nm HKUST-1 was synthesized for the first time and employed to investigate the size-dependent adsorption thermodynamics and kinetics of dyes.


3621–3628





Amorphous nickel-iron oxides/carbon nanohybrids for an efficient and durable oxygen evolution reaction

Bo Li, Shuangming Chen, Jie Tian, Ming Gong, Hangxun Xu*, and Li Song*

University of Science and Technology of China, China

We demonstrate a novel sonochemical method for synthesizing amorphous NiFeOx/C nanohybrids as highly active and durable electrocatalysts toward the oxygen evolution reaction. The amorphous NiFeOx/C nanohybrids with optimal composition exhibit a low overpotential of 290 mV at 10 mA·cm−2 and a Tafel slope of 31 mV·decade−1 in a 0.1 M KOH electrolyte, outperforming the benchmark RuO2 catalyst. The origins of the excellent electrocatalytic performance of the amorphous mixed oxide catalysts were investigated using advanced X-ray spectroscopic methods.


3629–3637





Confined reaction inside nanotubes: New approach to mesoporous g-C3N4 photocatalysts

Xueteng Liu, Fei Pang, Mingyuan He, and Jianping Ge*

East China Normal University, China

Mesoporous g-C3N4 nanorod photocatalysts are synthesized through the nano-confined thermal condensation of cyanamide in silica nanotubes with porous shells. The proposed method for the synthesis of mesoporous materials is an alternative to the traditional templating method.


3638–3647





The study of the interactions between graphene and Ge(001)/Si(001)

Pawel Dabrowski1,*, Maciej Rogala1, Iwona Pasternak2, Jacek Baranowski2, Wlodzimierz Strupinski2, Marek Kopciuszynski4, Ryszard Zdyb4, Mieczyslaw Jalochowski4, Iaroslav Lutsyk1,3, and Zbigniew Klusek1

1 University of Lodz, Poland

2 Institute of Electronic Materials Technology, Poland

3 Yuriy Fedkovych Chernivtsi National University, Ukraine

4 Maria Curie-Sklodowska University, Poland

The electronic and morphological properties of graphene grown on Ge(001)/Si(001) were examined both at the nano- and macroscale level. The present approach allowed the description of the influence of the germanium substrate on the energy bands of graphene and the electronic properties of the graphene layer.


3648–3661





Diagnosis of breast cancer by analysis of sialic acid concentrations in human saliva by surface-enhanced Raman spectroscopy of silver nanoparticles

Aida Hernández-Arteaga1, José de Jesús Zermeño Nava2, Eleazar Samuel Kolosovas-Machuca1, J. Jesús Velázquez-Salazar3, Ekaterina Vinogradova3, Miguel José-Yacamán1,3,and Hugo Ricardo Navarro-Contreras1,*

1 Universidad Autónoma de San Luís Potosí, México

2 Zona Universitaria, México

3 University of Texas at San Antonio, USA

Sialic acid (SA) levels in saliva are different between healthy women (red) and patients with breast cancer (green). In this work,the SA concentrations in saliva were determined by surface-enhanced Raman spectroscopy of citrate-covered silver nanoparticles; figure on the left: a noninvasive test, regardless of age or density of breast tissue.


3662–3670





Surface states in TiO2  submicrosphere films and their effect on electron transport

Jiawei Zheng1,2, Li’e Mo1, Wangchao Chen1, Ling Jiang1,Yong Ding1,3, Zhaoqian Li1, Linhua Hu1,*, and Songyuan Dai1,3,*

1 Hefei Institutes of Physical Science, Chinese Academy of Sciences, China

2 University of Science and Technology of China, China

3 North China Electric Power University, China

The surface state energy distribution and electron transfer kinetics of four TiO2 submicrospheres with different crystallinity were investigated. The discussion not only provides new insight on the surface states of TiO2 submicrospheres, but also exploits the influence of the locations of surface states and the band-edge shift on electron transfer and recombination.


3671–3679





Time-resolved impact electrochemistry for quantitative measurement of single-nanoparticle reaction kinetics

En Ning Saw, Markus Kratz, and Kristina Tschulik*

Ruhr-University Bochum, Germany

Time-resolved nanoelectrochemistry is demonstrated as a new tool to determine the reaction kinetics and reaction mechanism at a single nanoparticle.


3680–3689





Reduced graphene oxide decorated with Bi2O2.33 nanodots for superior lithium storage

Haichen Liang1, Xiyan Liu2, Dongliang Gao2, Jiangfeng Ni1,*and Yan Li2,*

1 Soochow University, China

2 Peking University, China

Reduced graphene oxide decorated with Bi2O2.33 nanodots exhibits stable and robust Li storage.


3690–3697





High-performance Li–S battery cathode with catalyst-like carbon nanotube-MoP promoting polysulfide redox

Yingying Mi1,2, Wen Liu1,*, Xiaolin Li1,3, Julia Zhuang1Henghui Zhou2, and Hailiang Wang1,*

1 Yale University, USA

2 Peking University, China

3 Chongqing University, China

Catalyst-like carbon nanotube-MoP can effectively promote lithium polysulfide redox and thus enhance the electrochemical performance of Li–S batteries.


3698–3705





Optical properties of conductive silver-nanowire films with different nanowire lengths

Xiaoming Yu1, Xuan Yu1,*, Jianjun Zhang2, Liqiao Chen1,Yunqian Long1, and Dekun Zhang2

1 Zhejiang Ocean University, China

2 Nankai University, China

Optical forward scattering and backscattering and the scattering ratio of the long-nanowires (L-NWs) and short-nanowires (S-NWs) were investigated. The scattering ratio was highly dependent on the mesh size and the nanowire length. S-NWs exhibited a nearly uniform scattering ratio for forward scattering and backscattering, and the L-NWs exhibited continually increasing backscattering. We also formulated a reflection-haze equation for evaluation of performance of the Ag NWs in optoelectronic devices.


3706–3714





Redox switch of ionic transport in conductive polypyrroleengineered unipolar nanofluidic diodes

Qianqian Zhang1, Zhen Zhang2, Hangjian Zhou1Zhiqiang Xie1, Liping Wen3, Zhaoyue Liu1,*, Jin Zhai1,*, and Xungang Diao1

1 Beihang University, China

2 Institute of Chemistry, Chinese Academy of Sciences, China

3 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, China

Redox-active polyporrole (PPy) polymers are introduced into an anodic aluminum oxide nanochannels to construct unipolar nanofluidic diodes exhibiting redox-switchable ionic transport behaviors. Based on the asymmetric component and the remarkable charge variation of PPy between oxidation and reduction state, the ion rectification and ion gating levels could be switched reversibly and dynamically.


3715–3725





Construction of hierarchical three-dimensional interspersed flower-like nickel hydroxide for asymmetric supercapacitors

Wutao Wei1, Weihua Chen2,*, Luoyi Ding1, Shizhong Cui1and Liwei Mi1,*

1 Zhongyuan University of Technology, China

2 Zhengzhou University, China

Three-dimensional interspersed flower-like nickel hydroxide was prepared via the exfoliation of cetyl trimethylammonium bromide (CTAB), together with the addition of carbon nanotubes (CNTs), which endowed N-4-CNT//active carbon (AC) supercapacitor devices with a high specific capacitance and excellent cycle stability.


3726–3742





Microstructuring of carbon/tin quantum dots via a novel photolithography and pyrolysis-reduction process

Xufeng Hong1, Liang He1,2,*, Xinyu Ma1, Wei Yang1, Yiming Chen1, Lei Zhang1, Haowu Yan1, Zhaohuai Li1, and Liqiang Mai1,3,*

1 Wuhan University of Technology, China

2 Rice University, USA

3 University of California, Berkeley, USA

A novel microfabrication process based on optimized photolithography combined with pyrolysis-reduction is proposed to fabricate interdigital porous carbon/tin quantum dots (C/Sn QDs) microelectrodes with uniform dispersion of Sn QDs (diameter of ~ 3 nm) in the carbon matrix. The as-fabricated C/Sn QDs micro-supercapacitor exhibits a high areal specific capacitance (5.79 mF·cm−2) and desirable cycling stability (93.3% capacitance retention after 5,000 cyclic voltammetry cycles).


3743–3753





Engineering the surface of LiCoO2 electrodes using atomic layer deposition for stable high-voltage lithium ion batteries

Jin Xie1, Jie Zhao1, Yayuan Liu1, Haotian Wang1, Chong Liu1Tong Wu1, Po-Chun Hsu1, Dingchang Lin1, Yang Jin1, and Yi Cui1,2,*

1 Stanford University, USA

2 SLAC National Accelerator Laboratory, USA

Chemically inert and ionically conductive LiAlO2 interfacial layers were deposited on LiCoO2 electrodes via atomic layer deposition. During prolonged cycling at high-voltage, the LiAlO2 coating not only prevented interfacial reactions between LiCoO2 electrode and electrolyte, as confirmed by electrochemical impedance spectroscopy and Raman characterizations, but also allowed lithium ions to freely diffuse into LiCoO2 without sacrificing the power density.


3754–3764





Efficient and 1,8-diiodooctane-free ternary organic solar cells fabricated via nanoscale morphology tuning using small-molecule dye additive

Shuhua Zhang1, Muhammad Naeem Shah1, Feng Liu2,*Zhongqiang Zhang1, Qin Hu3, Thomas P. Russell3, Minmin Shi1, Chang-Zhi Li1,*, and Hongzheng Chen1,*

1 Zhejiang University, China

2 Shanghai Jiao Tong University, China

3 Lawrence Berkeley National Laboratory, USA

Incorporation of a small-molecule dye into poly[4,8-bis(5- (2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene-co-3- fluorothieno[3,4-b]thiophene-2-carboxylate] (PTB7-Th):[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) blends leads to more efficient and stable organic solar cells. Energy transfer between components and electron-mobility improvement of the optimized nanoscale morphology are simultaneously achieved via the dye incorporation, leading to a stable 1,8-diiodooctane-free ternary device with 8.87% efficiency.


3765–3774





Construction of highly stable selenium nanoparticles embedded in hollow nanofibers of polysaccharide and their antitumor activities

Zhaohua Ping, Ting Liu, Hui Xu, Yan Meng, Wenhua Li, Xiaojuan Xu*, and Lina Zhang*

Wuhan University, China

Highly stable selenium nanoparticles (SeNPs) embedded in hollow nanofibers of polysaccharide exhibit excellent anticancer activities and biocompatibilities.


3775–3789





Generic synthesis and versatile applications of molecularly organic-inorganic hybrid mesoporous organosilica nanoparticles with asymmetric Janus topologies and structures

Guiju Tao1,2, Zhengyuan Bai1, Yu Chen1,*, Heliang Yao1Meiying Wu1,†, Ping Huang1, Luodan Yu1, Jiamin Zhang3, Chen Dai4, and Long Zhang1,*

1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China

2 Sinopec Shanghai Research Institute of Petrochemical Technology, China

3 Shanghai Institute of Blood Transfusion, China

4 the East Hospital Affiliated to Tongji University, China

 Present address: Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, China

A general bridged organic group-determined growth strategy was developed for the synthesis of molecularly organic-inorganic hybrid mesoporous organosilica nanoparticles (MONs) with multifarious Janus morphologies, and their formation mechanism was discussed. The hybrid framework, porous structure, hollow cavity, adaptive particle size, and Janus morphology endow these MONs with excellent pH-responsive drug release properties, high bilirubin-adsorption capacities, enhanced ultrasonography characteristics, and high hemocompatibilities.


3790–3810





Monodispersed Pt nanoparticles on reduced graphene oxide by a non-noble metal sacrificial approach for hydrolytic dehydrogenation of ammonia borane

Yao Chen, Xinchun Yang, Mitsunori Kitta, and Qiang Xu*

National Institute of Advanced Industrial Science and Technology (AIST), Japan

Monodispersed Pt nanoparticles on reduced graphene oxide (RGO) were prepared by a non-noble metal sacrificial approach for the hydrolytic dehydrogenation of ammonia borane; these monodispersed particles showed a turnover frequency value 2.6 times that of Pt/RGO prepared by direct deposition.


3811–3816





Active {010} facet-exposed Cu2MoS4 nanotube as highefficiency photocatalyst

Ke Zhang1, Yunxiang Lin1, Zahir Muhammad1, Chuanqiang Wu1, Shuang Yang1, Qun He1, Xusheng Zheng1, Shuangming Chen1,*, Binghui Ge2,*, and Li Song1,*

1 University of Science and Technology of China, China

2 Institute of Physics, Chinese Academy of Sciences, China

We demonstrate a novel facile hydrothermal method to successfully synthesize a {010} facet-exposed Cu2MoSnanotube, which shows greatly enhanced performance for both photodegradation and water splitting compared with {001} facet-exposed nanosheets. Theoretical calculations and experiments based on synchrotron radiation were performed to explain the high efficiency of Cu2MoS4 nanotubes.


3817–3825





Nanoparticles@nanoscale metal-organic framework composites as highly efficient heterogeneous catalysts for size- and shape-selective reactions

Bingqing Wang1, Wenxian Liu1, Weina Zhang2, and Junfeng Liu1,*

1 Beijing University of Chemical Technology, China

Nanjing Tech University (Nanjing Tech), China

Nanosized composites of metal-organic frameworks (MOFs) and metal nanoparticles (NPs) were fabricated by a controlled strategyaimed at reducing the size of MOF crystals grown around the NPs during their encapsulation process. This approach improved the catalytic performances of these compounds. As host matrices, the present nanoscale MOFs provided a shorter diffusion path and led to excellent size selectivity and higher catalytic activity of the Pt@nano-MOF composites compared to their larger-sized counterparts.


3826–3835





Synthesis of size-controlled CoMn2O4 quantum dots supported on carbon nanotubes for electrocatalytic oxygen reduction/evolution

Jiajia Shi, Kaixiang Lei, Weiyi Sun, Fujun Li, Fangyi Cheng*and Jun Chen

Nankai University, China

CoMn2O4 quantum dots of different sizes, selectively synthesized and supported on carbon nanotubes, showed a strongly size-dependent electrocatalytic performance in the oxygen reduction/evolution processes.


3836–3847





Black phosphorus induced photo-doping for highperformance organic-silicon heterojunction photovoltaics

Zhouhui Xia1, Pengfei Li1, Yuqiang Liu1, Tao Song1Qiaoliang Bao2, Shuit-Tong Lee1, and Baoquan Sun1,*

1 Soochow University, China

2 Monash University, Australia

A new strategy was developed to improve Si/metal contacts in organic-Si heterojunction solar cells. It uses black phosphorus induced photo-doping of zinc oxide, and achieves a remarkable power conversion efficiency of 15.2%.


3848–3856





Tribotronic transistor sensor for enhanced hydrogen detection

Yaokun Pang1,2,3, Libo Chen1,2,3, Guofeng Hu1,2,3Jianjun Luo1,2,3, Zhiwei Yang1,2,3, Chi Zhang1,2,*, and Zhong Lin Wang1,2,4,*

1 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, China

2 National Center for Nanoscience and Technology (NCNST), China

3 University of Chinese Academy of Sciences, China

4 Georgia Institute of Technology, USA

A novel ZnO tribotronic transistor sensor is developed by coupling a ZnO field effect transistor and triboelectric nanogenerator in free-standing mode. By applying an external mechanical force to the device for sliding electrification, the detection sensitivity and resolution of the ZnO tribotronic transistor sensor are improved.


3857–3864





Remarkable enhancement in failure stress and strain of penta-graphene via chemical functionalization

Yingyan Zhang1, Qingxiang Pei2,*, Zhendong Sha3Yongwei Zhang2, and Huajian Gao4,*

1 Western Sydney University, Australia

2 A*STAR, Singapore

3 Xi’an Jiaotong University, China

4 Brown University, USA

Using molecular dynamics simulations, we demonstrate that chemical functionalization with H, O, and OH can significantly enhance the failure stress and strain of penta-graphene (PG).


3865–3874





Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001)

Min Hong1, Xiebo Zhou1, Jianping Shi1, Yue Qi1, Zhepeng Zhang1, Qiyi Fang1, Yaguang Guo1, Yajuan Sun2, Zhongfan Liu1, Yuanchang Li3, Qian Wang1, and Yanfeng Zhang1,*

1 Peking University, China

2 ENN Group Co., Ltd., China

3 National Center for Nanoscience and Technology, Chinese Academy of Sciences, China

We reveal the atomic-scale structure and quasiparticle band gap of chemical vapor deposition-grown monolayer WS2 on Au foil via scanning tunneling microscopy/spectroscopy (STM/STS). Due to the weak interfacial interactions between WS2 and the Au substrate, the band gap of WS2 preserves its relatively intrinsic features on the Au(001) facet, and is not modulated by the striped superstructures that are formed.


3875–3884





Dual function of a high-contrast hydrophobic–hydrophilic coating for enhanced stability of perovskite solar cells in extremely humid environments

Jin Sun Yoo1, Gill Sang Han2, Seongha Lee2, Min Cheol Kim3, Mansoo Choi3, Hyun Suk Jung1,*, and Jung-Kun Lee2,*

1 Sungkyunkwan University, Republic of Korea

2 University of Pittsburgh, USA

3 Seoul National University, Republic of Korea

The multi-layer coating consisting of hydrophilic and hydrophobic layers successfully protects perovskite solar cells under extremely humid environment. The poly(methyl methacrylate) (PMMA)- polyurethane (PU)-SiO2 layer successfully expels water and the moderately hydrophilic PMMA layer promotes the recovery of the perovskite layer that contains a small amount of water.


3885–3895





Microfluidic bacterial traps for simultaneous fluorescence and atomic force microscopy

Oliver Peric, Melanie Hannebelle, Jonathan D. Adamsand Georg E. Fantner*

EPFL, Switzerland

 Present address: Department of Biosystems Science and Engineering, Switzerland

We solve the current limitations of the buffer-medium-independent bacterial immobilization of rod-shaped bacteria for atomic force microscopy.


3896–3908





Two-dimensional square transition metal dichalcogenides with lateral heterostructures

Qilong Sun, Ying Dai*, Na Yin, Lin Yu, Yandong Ma, Wei Wei, and Baibiao Huang

Shandong University, China


1S-MX2 lateral heterostructures demonstrate the successful construction of heterojunctions with excellent stability and properties based on new “building blocks”. Black phosphorus can serve as a potential substrate and the hybrid bidirectional heterostructures possess distinguishable type-II band alignment.


3909–3919





Multi-shelled TiO2/Fe2TiO5 heterostructured hollow microspheres for enhanced solar water oxidation

Muhammad Waqas1,3, Yanze Wei1,2, Dan Mao1,*, Jian Qi1Yu Yang1, Bao Wang1,*, and Dan Wang1,*

1 Institute of Process Engineering, Chinese Academy of Sciences, China

2 University of Science & Technology Beijing, China

3 University of Chinese Academy of Sciences, China

We designed and fabricated heterostructured TiO2/Fe2TiO5 hollow microspheres with single-, double-, closed-double-, triple-, and core–shell structures and different Fe/Ti molar ratios using a facile sequential templating approach. When tested as oxygen evolution reaction materials for water splitting, the closed-double-shelled TiO2/Fe2TiO5 hollow microspheres with 35% Fe exhibited the highest oxygen evolution reaction rate up to 375 μmol·g−1·h−1 and good stability for 5 h, which is competitive among most

Ti–Fe-based photocatalysts.


3920–3928





SnNi nanoneedles assembled 3D radial nanostructure loaded with SnNiPt nanoparticles: Towards enhanced electrocatalysis performance for methanol oxidation

Hao Fang, Yuting Chen, Ming Wen*, Qingsheng Wu, and Quanjing Zhu

Tongji University, China

Metal atom diffusion between Pt nanoparticles and a SnNi support (under appropriate conditions) formed SnNiPt ternary alloys on the surface of an assembled three-dimensional (3D) radial nanostructure composed of SnNi nanoneedles. Combining the all-orientation accessibility of the 3D nanostructure and the advantages of the alloy catalyst, a desirable methanol oxidation electrocatalyst was well-designed with higher activity, better CO poisoning resistance, lower onset potential, and favorable stability.


3929–3940







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