Increased O 2p State Density Enabling Significant Photoinduced Charge Transfer for Surface-Enhanced Raman Scattering of Amorphous Zn(OH)(2)

doi:10.1021/acs.jpclett.0c00187

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	Increased O 2p State Density Enabling Significant Photoinduced Charge Transfer for Surface-Enhanced Raman Scattering of Amorphous Zn(OH)(2)
	Li, Anran ; Yu, Jian ; Lin, Jie ; Chen, Mo ; Wang, Xiaotian ; Guo, Lin
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2020
卷号	11 期号:5 页码:1859-1866
关键词	TRANSITION-METAL GRAPHENE SERS PLATFORM
DOI	10.1021/acs.jpclett.0c00187
英文摘要	Enriching the electronic density of states (DOS) of semiconductors is the key to promoting charge transfer (CT) and achieving a large surface-enhanced Raman scattering (SERS) enhancement. Metal hydroxide semiconductors are anticipated to exhibit DOS that are higher than those of metal oxide because of their abundant 0 atoms; however, their SERS activity has not been verified. Here, combining density functional theory and experiments, we report a SERS sensitivity of amorphous Zn(OH)(2) [a-Zn(OH)(2)] that is much higher than that of amorphous ZnO (a-ZnO), ascribed to the abundant 0 atoms and hence enriched O 2p state density near the Fermi level in a-Zn(OH)(2), which gives rise to higher CT probabilities. Moreover, we find a-Zn(OH)(2) exhibits significant advantages in energy-level matching over a-ZnO for efficient photoinduced CT via strong vibronic coupling, ascribed to the upshifted valence band maximum and the narrower band gap of a-Zn(OH)(2). Via the synthesis of a-Zn(OH)(2) nanocages, an ultrahigh enhancement factor of 1.29 x 10(6) is obtained in semiconductor-based SERS.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19889]
专题	2020专题
作者单位	1.Guo, L (corresponding author), Beihang Univ, Sch Chem, Beijing Adv Innovat Ctr Big Data Based Precis Med, Beijing 100191, Peoples R China. 2.Wang, XT
推荐引用方式 GB/T 7714	Li, Anran,Yu, Jian,Lin, Jie,et al. Increased O 2p State Density Enabling Significant Photoinduced Charge Transfer for Surface-Enhanced Raman Scattering of Amorphous Zn(OH)(2)[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2020,11(5):1859-1866.
APA	Li, Anran,Yu, Jian,Lin, Jie,Chen, Mo,Wang, Xiaotian,&Guo, Lin.(2020).Increased O 2p State Density Enabling Significant Photoinduced Charge Transfer for Surface-Enhanced Raman Scattering of Amorphous Zn(OH)(2).JOURNAL OF PHYSICAL CHEMISTRY LETTERS,11(5),1859-1866.
MLA	Li, Anran,et al."Increased O 2p State Density Enabling Significant Photoinduced Charge Transfer for Surface-Enhanced Raman Scattering of Amorphous Zn(OH)(2)".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 11.5(2020):1859-1866.