Remarkable surface-enhanced Raman scattering on self-assembled {201} anatase

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Remarkable surface-enhanced Raman scattering on self-assembled {201} anatase
	Yu, Yaqin 1; Du, Jingjing 1; Jing, Chuanyong 1
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2019-12-07
卷号	7 期号:45 页码:14239-14244
ISSN号	2050-7526
英文摘要	Semiconductors exhibit great potential as a surface-enhanced Raman scattering (SERS) substrate due to their low cost, stability, and biocompatibility. However, their application has been essentially restricted by their intrinsically low SERS sensitivity (10-10(2)). Herein, sea urchin-like TiO2 was obtained by a self-assembled growth of crystals enclosed with the {201} facet. The high-symmetric spiny spheres exhibited appreciable Raman enhancement factors (EFs) of 1.6 x 10(6), three orders of magnitude higher than those asymmetric TiO2 with exposed {101}, {001}, and {100} facets. The greatest charge transfer upon dopamine adsorption occurred on {201} TiO2 due to its high density of unoccupied t(2g) orbitals, partly contributing to the excellent SERS performance. More importantly, the sea urchin-like spheres created high-density hotspots evenly distributed in the vicinity of sharp tips and at narrow gaps between the spines, enabling a strong electromagnetic field enhancement (1.4 x 10(4)). Benefiting from the specific electronic and morphologic properties, the self-assembled {201} TiO2 exhibited superior SERS performance in terms of both intensity and reproducibility. The insights gained from this study open a new avenue to improve the SERS performance of semiconductors for applications in biomedical analysis, food detection, and toxicity tests.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42581]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yu, Yaqin,Du, Jingjing,Jing, Chuanyong. Remarkable surface-enhanced Raman scattering on self-assembled {201} anatase[J]. JOURNAL OF MATERIALS CHEMISTRY C,2019,7(45):14239-14244.
APA	Yu, Yaqin,Du, Jingjing,&Jing, Chuanyong.(2019).Remarkable surface-enhanced Raman scattering on self-assembled {201} anatase.JOURNAL OF MATERIALS CHEMISTRY C,7(45),14239-14244.
MLA	Yu, Yaqin,et al."Remarkable surface-enhanced Raman scattering on self-assembled {201} anatase".JOURNAL OF MATERIALS CHEMISTRY C 7.45(2019):14239-14244.