ZnO/graphene/Ag composite as recyclable surface-enhanced Raman scattering substrates

Jie Zhang; Xiaolei Zhang; Yimin Ding; Yong Zhu

doi:10.1364/AO.55.009105

Applied Optics
Vol. 55,
Issue 32,
pp. 9105-9112
(2016)
•https://doi.org/10.1364/AO.55.009105

ZnO/graphene/Ag composite as recyclable surface-enhanced Raman scattering substrates

Jie Zhang, Xiaolei Zhang, Yimin Ding, and Yong Zhu

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Jie Zhang, Xiaolei Zhang, Yimin Ding, and Yong Zhu, "ZnO/graphene/Ag composite as recyclable surface-enhanced Raman scattering substrates," Appl. Opt. 55, 9105-9112 (2016)

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Table of Contents Category
- Optics at Surfaces
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About this Article
History
- Original Manuscript: August 1, 2016
- Revised Manuscript: October 10, 2016
- Manuscript Accepted: October 14, 2016
- Published: November 7, 2016
Virtual Issues
Virtual Journal for Biomedical Optics Vol. 12, Iss. 1

Abstract

Surface-enhanced Raman scattering active substrates based on ZnO/Ag and ZnO/graphene/Ag were prepared via synthesis of ZnO nanorod arrays through the ZnO seed layers, followed by deposition of Ag nanoparticles onto ZnO and ZnO/graphene surfaces using photocatalytic deposition. The hybrid structures were confirmed by scanning electron microscopy and Raman spectroscopy. Rhodamine 6G (R6G) was used as the probe analyte. The experimental results indicated that the detection concentration level was $10^{- 7} M$ with an enhancement factor of about $1.6 \times 10^{5}$ . Additionally, the photocatalytic properties of ZnO/Ag and ZnO/graphene/Ag were exploited to recycle these substrates through UV-assisted cleaning.

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Peak Position ( ${cm}^{- 1}$ )		613	773	1362	1644
$I_{RS}$ (counts)		83	83	250	107
EF	S1	—	—	$0.2 \times 10^{5}$	—
	S2	$1.2 \times 10^{5}$	$0.6 \times 10^{5}$	$0.2 \times 10^{5}$	$0.4 \times 10^{5}$
	S3	$1.6 \times 10^{5}$	$0.7 \times 10^{5}$	$0.2 \times 10^{5}$	$0.3 \times 10^{5}$
	S4	$1.4 \times 10^{5}$	$0.5 \times 10^{5}$	—	—
	S5	$1.5 \times 10^{5}$	$0.9 \times 10^{5}$	$0.3 \times 10^{5}$	$0.4 \times 10^{5}$
	S6	$1.4 \times 10^{5}$	$1.2 \times 10^{5}$	$0.3 \times 10^{5}$	$0.6 \times 10^{5}$

Raman Peak ( ${cm}^{- 1}$ )		613	773	1362	1505
S1	$I_{before}$ (counts)	1613	797.6	810	608
	$I_{after}$ (counts)	513	257	197	134
	$R$	68.2%	67.8%	75.7%	78%
S2	$I_{before}$ (counts)	4937	2138	527	445
	$I_{after}$ (counts)	162	61.6	42	42.8
	$R$	96.8%	97.2%	92.1%	90.4%
S3	$I_{before}$ (counts)	867	321	130	98
	$I_{after}$ (counts)	211	120	72.5	41
	$R$	75.7%	62.7%	44.3%	58.2%
S4	$I_{before}$ (counts)	1477	807	359	322
	$I_{after}$ (counts)	14	15	72	43
	$R$	99.0%	98.2%	80.0%	86.7%
S5	$I_{before}$ (counts)	1315	583	567	358
	$I_{after}$ (counts)	171	96	75	62
	$R$	87.0%	83.6%	86.8%	82.7%
S6	$I_{before}$ (counts)	4152	1824	1687	1143
	$I_{after}$ (counts)	542	306.5	196	124
	$R$	87.0%	83.2%	88.4%	89.2%

Peak Position ( ${cm}^{- 1}$ )		613	773	1362	1644
$I_{RS}$ (counts)		83	83	250	107
EF	S1	—	—	$0.2 \times 10^{5}$	—
	S2	$1.2 \times 10^{5}$	$0.6 \times 10^{5}$	$0.2 \times 10^{5}$	$0.4 \times 10^{5}$
	S3	$1.6 \times 10^{5}$	$0.7 \times 10^{5}$	$0.2 \times 10^{5}$	$0.3 \times 10^{5}$
	S4	$1.4 \times 10^{5}$	$0.5 \times 10^{5}$	—	—
	S5	$1.5 \times 10^{5}$	$0.9 \times 10^{5}$	$0.3 \times 10^{5}$	$0.4 \times 10^{5}$
	S6	$1.4 \times 10^{5}$	$1.2 \times 10^{5}$	$0.3 \times 10^{5}$	$0.6 \times 10^{5}$

Raman Peak ( ${cm}^{- 1}$ )		613	773	1362	1505
S1	$I_{before}$ (counts)	1613	797.6	810	608
	$I_{after}$ (counts)	513	257	197	134
	$R$	68.2%	67.8%	75.7%	78%
S2	$I_{before}$ (counts)	4937	2138	527	445
	$I_{after}$ (counts)	162	61.6	42	42.8
	$R$	96.8%	97.2%	92.1%	90.4%
S3	$I_{before}$ (counts)	867	321	130	98
	$I_{after}$ (counts)	211	120	72.5	41
	$R$	75.7%	62.7%	44.3%	58.2%
S4	$I_{before}$ (counts)	1477	807	359	322
	$I_{after}$ (counts)	14	15	72	43
	$R$	99.0%	98.2%	80.0%	86.7%
S5	$I_{before}$ (counts)	1315	583	567	358
	$I_{after}$ (counts)	171	96	75	62
	$R$	87.0%	83.6%	86.8%	82.7%
S6	$I_{before}$ (counts)	4152	1824	1687	1143
	$I_{after}$ (counts)	542	306.5	196	124
	$R$	87.0%	83.2%	88.4%	89.2%

Abstract

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Tables (2)

Equations (1)

Applied Optics