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Electrospray deposition for single nanoparticle studies
Analytical Methods ( IF 2.7 ) Pub Date : 2021-08-17 , DOI: 10.1039/d1ay01295a
Gargi S Jagdale 1 , Myung-Hoon Choi 1 , Natasha P Siepser 1 , Soojin Jeong 1 , Yi Wang 1 , Rebecca X Skalla 1 , Kaixiang Huang 1 , Xingchen Ye 1 , Lane A Baker 1
Affiliation  

Single entity electrochemical (SEE) studies that can probe activities and heterogeneity in activities at nanoscale require samples that contain single and isolated particles. Single, isolated nanoparticles are achieved here with electrospray deposition of colloidal nanoparticle solutions, with simple instrumentation. Role of three electrospray (ES) parameters, viz. spray distance (emitter tip-to-substrate distance), ES current and emitter tip diameter, in the ES deposition of single Au nano-octahedra (Au ODs) is examined. The ES deposition of single, isolated Au ODs are analyzed in terms of percentage of single NPs and local surface density of deposition. The local surface density of ES deposition of single Au ODs was found to increase with decrease in spray distance and emitter tip diameter, and increase in ES current. While the percentage of single particle ES deposition increased with increase in spray distance and decrease in emitter tip size. No significant change in the single Au ODs ES deposition percentage was observed with change in ES current values included in this study. The most favourable conditions in the ES deposition of Au ODs in this study resulted in the local surface density of 0.26 ± 0.05 single particles per μm2 and observation of 96.3% single Au OD deposition.

中文翻译:

用于单个纳米颗粒研究的电喷雾沉积

单实体电化学 (SEE) 研究可以探测纳米级活动的活动和异质性,需要包含单个和孤立粒子的样品。单个、孤立的纳米粒子在这里通过胶体纳米粒子溶液的电喷雾沉积实现,使用简单的仪器。三个电喷雾 (ES) 参数的作用,即。检查单个 Au 纳米八面体 (Au OD) 的 ES 沉积中的喷雾距离(发射器尖端到基板的距离)、ES 电流和发射器尖端直径。根据单个 NP 的百分比和沉积的局部表面密度分析单个、孤立的 Au OD 的 ES 沉积。发现单个 Au OD 的 ES 沉积的局部表面密度随着喷射距离和发射器尖端直径的减小以及 ES 电流的增加而增加。而单粒子 ES 沉积的百分比随着喷射距离的增加和发射器尖端尺寸的减小而增加。随着本研究中包括的 ES 电流值的变化,未观察到单个 Au OD ES 沉积百分比的显着变化。在本研究中,Au OD 的 ES 沉积中最有利的条件导致局部表面密度为 0.26 ± 0。2和观察到 96.3% 的单个 Au OD 沉积。
更新日期:2021-08-25
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