CHEMISTRY-A EUROPEAN JOURNAL
·
2013
·Vol. 19
·期 28
·9211-9217
·
IF 5.831
Chuhong Zhu,Guowen Meng,Qing Huang,Yao Zhang,Haibin Tang,Yiwu Qian,Bin Chen,Xiujuan Wang
Graphical SERS up : Parallel face-exposed Ag nanoplates vertically grown on micro-hemisphere surfaces have been prepared by firstly electrodepositing the micro-hemispheres assembled by Ag nanoplates, the planar surfaces of which are stuck together, on indium tin oxide (ITO) substrates, and then Ostwald ripening the as-electrodeposited micro-hemispheres in water (see figure). Ag nanoplates, as two-dimensional plasmonic nanostructures, have attracted intensive attention due to their strong shape-dependent optical properties and related applications. Here parallel face-exposed Ag nanoplates vertically grown on micro-hemisphere surfaces have been achieved by firstly electrodepositing the micro-hemispheres assembled by Ag nanoplates, whose planar surfaces are stuck together, on indium tin oxide substrates, and then Ostwald ripening the as-electrodeposited micro-hemispheres in water. The sizes of the nanoplates and the gaps between the neighboring nanoplates have been tailored by tuning the Ostwald-ripening duration, so that the SERS activity of the micro-hemispheres has been remarkably improved. The improved SERS activity can be well explained by our systematic finite-element simulation. Therefore, Ostwald ripening offers a route to the synthesis of Ag nanoplates, and the optimization of plasmon coupling and SERS activity of nanostructure-assembled systems.
研究领域:
材料科学
·
表面增强拉曼光谱
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Songyue Pan,Jingqiang He,Weijie Wang,Jiatong Yan,Shan Jiang,Chuanxi Lin,Hong Tang,Ronghui Guo
With the development of the internet of things (IoT) and the rise of the concept of the internet of everything, wearable sensor devices are booming as mobile terminals and have a huge market value. However, the fabrication of nanofiber membrane-based pressure sensors with special microstructures remains a significant challenge. In this study, template-assisted electrospinning was used to fabricate microhemispherical thermoplastic polyurethane (TT) nanofiber membranes. The preparation of MXene@CNTs/TT (MCTT) nanofiber membranes was conducted via the ultrasound-assisted dip-coating method, utilizing MXene and carbon nanotubes (CNTs) as composite conductive materials. Subsequently, polydimethylsiloxane (PDMS) encapsulation was employed to prepare PDMS-MCTT conductive nanofiber membranes. Utilizing an aligned assembly strategy based on the microhemispherical structure, the PDMS-MCTT bilayer pressure sensor exhibits high sensitivity (Smax = 471.3 kPa–1), wide pressure range (0–521.6 kPa), low detection limit (0.003 kPa), fast response time (7 and 8 ms) and reliable cycling performance (3000 cycles). In addition, the sensor offers excellent breathability and hydrophobicity (contact angle of 132.7°). Usefulness of the sensor in detecting body signals highlights its potential for motion detection and health monitoring.
研究领域:
材料科学
·
生物医学工程
·
物联网技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 6
·2100202
·
IF 14.188
Tiantian Dai,Zanhong Deng,Xiaodong Fang,Huadong Lu,Yong He,Junqing Chang,Shimao Wang,Nengwei Zhu,Liang Li,Gang Meng
Seeking a facile approach to directly assemble bridged metal oxide nanowires on substrates with predefined electrodes without the need for complex postsynthesis alignment and/or device procedures will bridge the gap between fundamental research and practical applications for diverse biochemical sensing, electronic, optoelectronic, and energy storage devices. Herein, regularly bridged CuO microhemisphere nanowire arrays (RB-MNAs) are rationally designed on indium tin oxide electrodes via thermal oxidation of ordered Cu microhemisphere arrays obtained by solid-state dewetting of patterned Ag/Cu/Ag films. Both the position and spacing of CuO microhemisphere nanowires can be well controlled by as-used shadow mask and the thickness of Cu film, which allows homogeneous manipulation of the bridging of adjacent nanowires grown from neighboring CuO hemispheres, and thus benefits highly sensitive trimethylamine (TMA) sensors and broad band (UV–visible to infrared) photodetectors. The electrical response of 3.62 toward 100 ppm TMA is comparable to that of state-of-the-art CuO-based sensors. Together with the feasibility of in situ assembly of RB-MNAs device arrays via common lithographic technologies, this work promises commercial device applications of CuO nanowires.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 48
·15259-15268
·
IF 6.641
Lingling Zhang,Xiaodie Li,Weihua Liu,Rui Hao,Hongrui Jia,Yanzhu Dai,Muhammad Usman Amin,Hongjun You,Tao Li,Jixiang Fang
The fabrication of flexible surface-enhanced Raman scattering (SERS) substrates with high sensitivity and signal consistency in a simple and low-cost way have been a crucial and urgent challenge. In this study, we demonstrated a flexible transparent three-dimensional (3D) ordered micro-hemisphere (MHS) array PDMS film with self-assembled Au nanoparticles (NPs) (an Au NP-MHS array film) as a surface-enhanced Raman scattering (SERS) platform for the in situ detection of pesticides in food. According to the finite difference time domain (FDTD) simulation results, the Au NP-MHS array film possesses high-density and ordered “hot spots” to enhance the electromagnetic field (EMF), so that the sensitivity and signal consistency are effectively improved. The optimized Au NP-MHS array film exhibits fascinating SERS sensitivity, with a limitation of crystal violet (CV) reaching 10−12 M as well as excellent consistency (RSD = 4.89% at 10−8 M). For in situ pesticide detection in fruits, this flexible film was pasted on the surfaces of tomatoes. The carbendazol and parathion were directly detected, and distinctly identified even at a low concentration (10−8 M). The flexible Au NP-MHS array film could be a potential candidate for the SERS substrate applied in the rapid and true inspection.
研究领域:
材料科学
·
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）