The Hidden Heroes: Holes in Charge-Driven Desorption Mass Spectrometry

被引：23

作者：

Cheng, Yu-Hong ^{[1
,2
]}

Ng, Kwan-Ming ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Hong Kong, Dept Chem, Hong Kong, Peoples R China

[2] Univ Hong Kong, State Key Lab Synthet Chem, Hong Kong, Peoples R China

[3] Shantou Univ, Dept Chem, Shantou 515063, Guangdong, Peoples R China

[4] Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Shantou 515063, Guangdong, Peoples R China

[5] Chem & Chem Engn Guangdong Lab, Shantou 515031, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2020年 / 92卷 / 08期

关键词：

INTERNAL ENERGY-DISTRIBUTION; GOLD NANOPARTICLES; ION-DESORPTION; ENHANCEMENT; DYNAMICS;

D O I：

10.1021/acs.analchem.0c00036

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Photoexcited hot carriers have high impacts on various fields. However, in contrast to the attention attracted by the hot-electrons, the contributions of holes are seldom recognized. Yet, by simply removing the hot-electrons but retaining the holes on the surface of photoexcited plasmonic gold nanoparticles, a 60-fold ion intensity amplification could be achieved in laser desorption ionization mass spectrometry. A new desorption mechanism termed "charge-driven desorption" has been derived to rationalize the significant improvement.

引用

页码：5645 / 5649

页数：5

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