题目：

R6G Molecule Induced Modulation of The Optical Properties of Reduced Graphene Oxide Nanosheets for Use in Ultrasensitive SPR Sensing

作者：

Tianyu Xue¹, Shansheng Yu¹, Xiaoming Zhang¹, Xinzheng Zhang², Lei Wang², Qiaoliang Bao³, Caiyun Chen³, Weitao Zheng¹ & Xiaoqiang Cui¹

单位：

¹Key Laboratory of Automobile Materials of MOE and State Key Laboratory of Superhard Materials, Department ofMaterials Science, Jilin University, Changchun 130012, China.

²The MOE Key Laboratory of Weak-Light NonlinearPhotonics, School of Physics and TEDA Applied Physics Institute, Nankai University, Tianjin 300457, China.

³Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materialsand Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China.

摘要：

A proper understanding of the role that molecular doping plays is essential to research on the modulation of the optical and electronic properties of graphene. The adsorption of R6G molecules onto defect-rich reduced graphene oxide nanosheets results in a shift of the Fermi energy and, consequently, a variation in the optical constants. This optical variation in the graphene nanosheets is used to develop an ultrasensitive surface plasmon resonance biosensor with a detection limit of 10⁻¹⁷ M (0.01 fM) at the molecular level. A density functional theory calculation shows that covalent bonds were formed between the R6G molecules and the defect sites on the graphene nanosheets. Our study reveals the important role that defects play in tailoring the properties and sensor device applications of graphene materials.

影响因子：

5.578

分区情况：

2区

链接：

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4758061/

(责任编辑：杨阳，联系方式：yangyangcnst@suda.edu.cn)