Gap-Dependent Plasmon Coupling in Au/AgAu Hybrids for Improved SERS Performance

拉曼光谱 材料科学 等离子体子 分子 光电子学 带隙 联轴节(管道) 纳米技术 化学 光学 物理 有机化学 冶金
作者
Liang Ma,Youlong Chen,Da‐Jie Yang,Si‐Jing Ding,Lun Xiong,Pingli Qin,Xiang‐Bai Chen
出处
期刊:Journal of Physical Chemistry C [American Chemical Society]
卷期号:124 (46): 25473-25479 被引量:16
标识
DOI:10.1021/acs.jpcc.0c07701
摘要

Nanogap-based Raman substrates with Raman reporters embedded in the nanogap have been demonstrated to possess superior SERS responses and have found potential applications in molecular detection and sensing. Herein, multigap Au/AgAu hybrids with rhodamine B (RhB) molecules embedded in the nanogap are prepared as gap-enhanced Raman substrates to achieve improved SERS performances. Au/AgAu hybrids with tunable gap widths and counts are synthesized by a controlled galvanic replacement process based on Au nanospheres. The strong and adjustable plasmon coupling in the multigap structure endows Au/AgAu hybrids with prominent plasmon absorption and strong electric fields, endowing the hybrids with outstanding SERS responses. Specially, one-gap Au/AgAu hybrids show tunable enhanced SERS signals by changing the gap width due to the adjustable plasmon coupling. One-gap Au/AgAu hybrids with about a 0.8 nm gap width exhibit the highest SERS signal, and the signal is decreased as the gap width increased from 0.8 to 3.8 nm. Moreover, with RhB molecules fixedly embedded in the first nanogap (width ≈ 1.9 nm), the SERS signals of Au/AgAu hybrids are further improved by adding additional nanogaps. In particular, Au/AgAu hybrids with three gaps possess the highest Raman response, owing to a further enhanced electric field caused by multi-interfacial plasmon coupling. Furthermore, the embedded position of RhB in the four-gap structure is adjusted for higher SERS performance. Four-gap Au/AgAu hybrids with RhB molecules embedded in the third nanogap exhibit the best SERS activity due to the further enhanced electric field, which may be caused by the electric field coupling between the second and fourth nanogaps.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
CipherSage应助Ronnie采纳,获得10
1秒前
魏笑白发布了新的文献求助10
1秒前
2秒前
传奇3应助阿腾采纳,获得10
3秒前
進擊的巨人完成签到,获得积分10
4秒前
4秒前
大模型应助科研通管家采纳,获得10
4秒前
丘比特应助科研通管家采纳,获得10
5秒前
SciGPT应助科研通管家采纳,获得10
5秒前
5秒前
5秒前
量子星尘发布了新的文献求助10
6秒前
李安全完成签到,获得积分10
8秒前
llliu发布了新的文献求助10
9秒前
轻松的亦寒应助肉肉采纳,获得20
9秒前
星辰大海应助鞥枊采纳,获得10
10秒前
11秒前
小二郎应助腼腆的绝山采纳,获得10
11秒前
12秒前
12秒前
12秒前
13秒前
123发布了新的文献求助10
14秒前
14秒前
小杰完成签到 ,获得积分10
16秒前
晗月完成签到,获得积分10
16秒前
via完成签到,获得积分10
17秒前
17秒前
wtt发布了新的文献求助10
17秒前
18秒前
ky一下完成签到,获得积分10
18秒前
笔墨留香发布了新的文献求助10
19秒前
谦让的巨人完成签到,获得积分20
20秒前
21秒前
23秒前
23秒前
鞥枊发布了新的文献求助10
24秒前
25秒前
25秒前
gabee完成签到 ,获得积分10
25秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975658
求助须知:如何正确求助?哪些是违规求助? 3519986
关于积分的说明 11200481
捐赠科研通 3256410
什么是DOI,文献DOI怎么找? 1798247
邀请新用户注册赠送积分活动 877490
科研通“疑难数据库(出版商)”最低求助积分说明 806376