当前位置：
X-MOL 学术
›
ACS Appl. Nano Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Nanometer-Thick Films of Aligned ZnO Nanowires Sensitized with Au Nanoparticles for Few-ppb-Level Acetylene Detection
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-09-01 , DOI: 10.1021/acsanm.0c01807 Jiansong Miao 1 , Jerry Y.S. Lin 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-09-01 , DOI: 10.1021/acsanm.0c01807 Jiansong Miao 1 , Jerry Y.S. Lin 1
Affiliation
|
Wireless devices for environmental and health monitoring require the development of stable and highly sensitive thin metal oxide gas-sensing films. This paper reports one-step Langmuir–Blodgett assembly of ultrathin (20 nm) nanostructured films of aligned ZnO nanowires with 10 nm-wide v-grooves on the surface, followed by sensitization with Au nanoparticles (Au NPs) by sputtering and postannealing. The ridges of the nanopatterns are revealed as diffusion barriers capable of preventing Au NPs from sintering via particle migration and growth (PMC). The resulting ZnO Langmuir–Blodgett film decorated with high dispersion of small Au NPs functions as a highly responsive conductance switch, which demonstrates unprecedented sensitivity (37 ppm–1) and detection limit (3 ppb) toward acetylene (C2H2), a key marker gas for air pollution caused by anthropogenic emission. The fabrication method for the stabilized nanometric metal on the Langmuir–Blodgett film reported in this work not only provides a general strategy to improve the sensitivity of the thin sensing film but also can be applied to many metal nanodot-based applications, such as solar cells, plasmon-resonance waveguides, and biosensors.
中文翻译：
用于几ppb级乙炔检测的Au纳米粒子敏化的取向ZnO纳米线的纳米厚膜。
用于环境和健康监控的无线设备需要开发稳定且高度敏感的薄金属氧化物气体传感薄膜。本文报道了一步一步的Langmuir-Blodgett组装，它是在表面上具有10 nm宽v形槽的对齐的ZnO纳米线的超薄（20 nm）纳米结构薄膜的表面，然后通过溅射和后退火对Au纳米粒子（Au NPs）进行敏化。纳米图案的脊被揭示为能够阻止金纳米颗粒通过颗粒迁移和生长（PMC）烧结的扩散阻挡层。所得的ZnO Langmuir-Blodgett膜装饰有小Au NPs的高分散性，可作为高响应电导开关，显示出前所未有的灵敏度（37 ppm –1）和对乙炔的检测极限（3 ppb）（C 2H 2），人为排放引起的空气污染的主要标志气体。在这项工作中报道的在Langmuir-Blodgett膜上稳定的纳米金属的制造方法不仅提供了提高薄膜敏感度的通用策略，而且还可以应用于许多基于金属纳米点的应用，例如太阳能电池，等离子共振波导和生物传感器。
更新日期：2020-09-25
中文翻译：
用于几ppb级乙炔检测的Au纳米粒子敏化的取向ZnO纳米线的纳米厚膜。
用于环境和健康监控的无线设备需要开发稳定且高度敏感的薄金属氧化物气体传感薄膜。本文报道了一步一步的Langmuir-Blodgett组装，它是在表面上具有10 nm宽v形槽的对齐的ZnO纳米线的超薄（20 nm）纳米结构薄膜的表面，然后通过溅射和后退火对Au纳米粒子（Au NPs）进行敏化。纳米图案的脊被揭示为能够阻止金纳米颗粒通过颗粒迁移和生长（PMC）烧结的扩散阻挡层。所得的ZnO Langmuir-Blodgett膜装饰有小Au NPs的高分散性，可作为高响应电导开关，显示出前所未有的灵敏度（37 ppm –1）和对乙炔的检测极限（3 ppb）（C 2H 2），人为排放引起的空气污染的主要标志气体。在这项工作中报道的在Langmuir-Blodgett膜上稳定的纳米金属的制造方法不仅提供了提高薄膜敏感度的通用策略，而且还可以应用于许多基于金属纳米点的应用，例如太阳能电池，等离子共振波导和生物传感器。
京公网安备 11010802027423号