Article
Chemistry, Physical
Ranveer Singh, Heecheol Shin, Sanghee Nah, Ji-Yong Park, Hyungtak Seo
Summary: Researchers fabricated a ZnO/Al2O3/silver-nanowires heterostructure and studied the tunneling dynamics of hot carriers via the Al2O3 layer, as well as observed broad light absorption in the heterostructure. This study provides an effective approach for improving the hot carrier injection efficiency in wide band gap materials for use in photovoltaics and photocatalysis applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Dong Wang, Yumin Liu, Guanwu Li, Chichu Qin, Lu Huang, Yingpeng Wu
Summary: The growth mechanism of Li dendrites is important for protecting Li metal anodes, and joule heat is proposed as another inducing mechanism for Li dendrites. Nonuniform interface structure can lead to disordered surface thermal distribution based on joule heat theory, which may induce chaotic nucleation and growth of dendrites. A new liquid metal welding strategy is explored to overcome this issue and is universally compatible with other traditional protection routes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Ryota Fukuzawa, Daichi Kobayashi, Takuji Takahashi
Summary: Electrostatic force microscopy (EFM) is used to examine the electrostatic force between an AFM tip and sample surface, allowing evaluation of their capacitance and surface potential. The dependences of the electrostatic force on dc voltage and ac voltage frequency can be used to investigate carrier density, carrier type, and deep-level states in a semiconductor. Proper distance control is necessary in EFM to ensure accurate measurements, and the oscillation amplitude of a cantilever can be effectively used for feedback control. The 1 A-mode operation in EFM shows good robustness against the strong electrostatic force and allows proper measurements of tip-sample capacitance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Multidisciplinary
Junli Liu, Mingxin Wang, Maria C. Dipalo, Jing Zhuang, Wenxiong Shi, Xun Wang
Summary: The study successfully prepared CuO-PMA-Ag sub-1 nm nanosheet heterostructures with excellent catalytic activity, paving the way for the synthesis and broader applications of multi-component 2D hybrid sub-1 nm heterostructures.
Article
Nanoscience & Nanotechnology
Qingyang Xu, Hangkong Ouyang, Yini Lin, Maosheng Ye, Xiaojing Wang, Lining Sun, Tao Chen, Li Ma
Summary: This article presents a theoretical model of a CNT circuit with staggered electrodes and a welding model of the CNT bundle circuit. It explores how the quantity, diameter, and length of CNTs in the bundle affect the welding effect. The results show that longer and fewer CNTs in the bundle improve the electrical conductivity more significantly.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Junfeng Cui, Zhenyu Zhang, Le Lv, Kazuhito Nishimura, Guoxin Chen, Nan Jiang
Summary: The self-attraction of nanowires can lead to clustering in high density and potential short circuits in devices. A versatile method for investigating this phenomenon was developed, revealing a two-stage mechanism for SiC nanowires. The charge density and Hamaker constant play key roles in nanowire attraction.
Article
Chemistry, Physical
Bin Shi, Xuehui Gan, Chi Zhang, Haojie Lang, Kun Zou, Tianzhao Bu, Yitian Peng
Summary: The study investigates nanoscale triboelectrification and nanofriction on insulating SiO2 surface using AFM and scanning Kelvin probe microscopy. It finds that nanofriction increases with enhanced tribocharge density and decreases with reduced tribocharges due to charge diffusion. These findings provide insights into the role of nanoscale triboelectrification on nanofriction and could help control energy dissipation in sliding nanofriction.
Article
Chemistry, Physical
Dan Guo, Yingjie Huo, Congpu Mu, Bochong Wang, Jianyong Xiang, Anmin Nie, Kun Zhai, Tianyu Xue, Fusheng Wen, Zhongyuan Liu
Summary: In this study, a multifunctional sandwich structure composite film composed of ANF, AgNWs, and GNs was fabricated for EMI shielding and Joule heating applications. The film demonstrated excellent EMI shielding performance and outstanding Joule heating property with increasing mass ratio of AgNWs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Qiaoxia Zhang, Xiangwei Liu, Haoran Wang, Qing Liu, Qingyun Liu, Xianxi Zhang
Summary: In this work, a thrombin photoelectrochemical aptasensor was developed using PTCA and Au nanoparticles to enhance the photocurrent response of ZnO NRs, and Ag@Ag2S for signal-off detection of thrombin with a detection limit of 33 fM.
Article
Chemistry, Analytical
Meng Zhang, Songjia Han, Zhi-Yang Xuan, Xiaohui Fang, Xiaoming Liu, Wu Zhang, Hui-Jiuan Chen
Summary: Silver nanowire (AgNW)-coated thin films are widely used in soft electronics due to their good conductivity, transparency, and flexibility. This study focused on microwave welding of AgNW-based soft electrodes to enhance conductivity, with results showing that overheating caused fusion and breakage of nanowires, affecting film resistance. The research successfully demonstrated the fabrication of soft electrodes for glucose sensing.
Article
Nanoscience & Nanotechnology
Jungeun Song, Malkeshkumar Patel, Sara Evelyn Johannesson, Kayoung Cho, JaeHong Park, Joondong Kim, Dong-Wook Kim
Summary: Global climate change has led to an increased reliance on photovoltaic technology for urban energy needs. Transparent photovoltaic devices offer not only electric energy, but also improve thermal efficiency in buildings. This study investigates the photovoltaic characteristics of NiO/ZnO wide-bandgap oxide transparent photovoltaic heterojunctions with Ag nanowire top electrodes, focusing on the contributions of surface plasmon excitation in AgNWs. The results show that the AgNW-based top electrodes enhance wavelength-selective absorption and the effective collection of photocarriers in transparent photovoltaic devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jae Hwan Jeong, Yeonjoon Jung, Jang-Ung Park, Gwan-Hyoung Lee
Summary: This study investigates the gate-tunable electrostatic friction of grain boundaries (GBs) in chemically vapor deposition (CVD)-grown MoS2 films. It is found that the electrostatic friction is generated by the Coulomb interaction between the tip and the carriers of MoS2, which is related to the localized band structure of GBs. The results show a strong correlation between electrostatic friction and localized band structure, providing a novel method for identifying and characterizing GBs in polycrystalline 2D materials.
Article
Nanoscience & Nanotechnology
Xiaofeng Hu, Shujie Li, Zuimin Jiang, Xinju Yang
Summary: Periodically ordered arrays of vertically aligned Si nanowires with controllable diameters and lengths were successfully fabricated and investigated for their photoconductive properties using PCAFM and EFM. The results showed that Si nanowires have good photoconductance and photoresponse capability, with the photocurrent increasing significantly with laser intensity. The size dependence study revealed that Si nanowires with smaller diameters and shorter lengths display better photoconductive properties, attributed to the size-dependent barrier height variation induced by photogenerated charges.
NANOSCALE RESEARCH LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yeseong Choi, Su-Mi Kim, Youhee Heo, Gyudo Lee, Ji Yoon Kang, Dae Sung Yoon
Summary: The study found that with increasing concentrations of Aβ(42) oligomers, the surface charge of exosomes increased, indicating that exosomes contain more Aβ(42) and may serve as transport vesicles for Aβ(42).
Article
Materials Science, Multidisciplinary
Hironori Tohmyoh, Taro Mase, Taiga Sakatoku
Summary: This paper reports the tensile strength of thin Pt wires welded by Joule heat. The results showed that the welds were stronger than the wires themselves, and the tensile strength was correlated with the inverse of the total amount of supplied Joule heat.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)