Fabrication of nanoporous silver film by dealloying Ag/alpha-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy

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

	Fabrication of nanoporous silver film by dealloying Ag/alpha-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy
	Bekana, Deribachew ; Liu, Rui ; Li, Shasha ; Liu, Jing-Fu
刊名	SENSORS AND ACTUATORS B-CHEMICAL
	2019-05-01
卷号	286 页码:94-100
关键词	Nanoporous silver film Iron oxide Nanocomposite Dealloying Surface-enhanced Raman spectroscopy Sudan III
英文摘要	A facile and reliable method for fabrication of nanoporous Ag film as surface-enhanced Raman spectroscopy (SERS) substrates was developed by dealloying the low-cost Ag/alpha-Fe2O3 nanocomposite in dilute acid solution. Influencing parameters such as different dealloying solutions, electrolyte concentration and dealloying time were optimized, and a uniform nanoporous Ag film of tunable and smaller ligament size was synthesized by etching the nanocomposite in sulfuric acid as a dealloying solution, while hydrochloric acid produced coarsened Ag nanoporous structures. Besides, the ligament size of the synthesized nanoporous Ag film increased with the electrolyte concentration and dealloying time. SERS activity of the as-synthesized nanoporous Ag film was evaluated using R6G as Raman probe, and the nanoporous Ag film with smaller ligament size exhibited strong SERS activity with a SERS enhancement factor of 7.47 x 10(6). The substrate exhibited good sensitivity and uniformity (RSD, 13.3%), and practical applicability for SERS detection of Sudan III, a synthetic organic dye banned as food additives, and achieved a detection limit of 0.5 mu M. More importantly, the developed method ensures low-cost and reliable method of nanoporous materials fabrication from low-cost semiconductor based nanomaterials for applications in wide variety of fields.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42947]
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, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, POB 2871, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Bekana, Deribachew,Liu, Rui,Li, Shasha,et al. Fabrication of nanoporous silver film by dealloying Ag/alpha-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy[J]. SENSORS AND ACTUATORS B-CHEMICAL,2019,286:94-100.
APA	Bekana, Deribachew,Liu, Rui,Li, Shasha,&Liu, Jing-Fu.(2019).Fabrication of nanoporous silver film by dealloying Ag/alpha-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy.SENSORS AND ACTUATORS B-CHEMICAL,286,94-100.
MLA	Bekana, Deribachew,et al."Fabrication of nanoporous silver film by dealloying Ag/alpha-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy".SENSORS AND ACTUATORS B-CHEMICAL 286(2019):94-100.