Abstract

A novel, simple, and inexpensive flexible surface-enhanced Raman-scattering (SERS) platform based on common laboratory filter paper modified with ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$ flakes was reported. ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$ synthesized from a ${{\rm{Ti}}_3}{\rm{Al}}{{\rm{C}}_2}$ phase with a mixture of HCl and LiF and ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$ nanosheets were characterized by the TEM, XRD, UV–Vis spectrum, and Raman spectrum. Paper-based substrate has been proven to sample on rough and irregular surfaces. Thus, ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$ was further manufactured as paper substrate by the immersion method to transfer nanosheets to filter paper. SERS activity of prepared substrate was demonstrated using R6G by the same filter paper modified with and without ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$, and various concentrations of R6G were tested to prove the sensitivity of the substrates. Further detection of CV and MG certified the universality of paper substrate based on ${{\rm{Ti}}_3}{{\rm{C}}_2}{{\rm{T}}_{\rm x}}$ nanosheets for detection of organic pollutants. The uniformity and stability were proved by CV and R6G molecules. This SERS platform combines the advantages of 2D material and flexible paper scaffolds, resulting in a highly sensitive, cost-efficient, and easy-to-manufacture large-scale flexible substrate and is expected to be used in practice.

© 2020 Optical Society of America

Synthesis of two-dimensional Ti₃C₂T_x/Au nanosheets with SERS performance

Ming Yue, Fang Li, Nianhang Lu, Pei Yao, Tao Xue, and Ping Liu
Appl. Opt. 58(30) 8290-8294 (2019)

Preparation of 3D ZnTiO₃/Ag NPs composite as the photocatalytic SERS-active substrate with well reusability

Jiajun Lu, Xuejian Du, Zhen Li, Yuzhi Song, Chao Zhang, Jing Yu, and Qianqian Peng
Appl. Opt. 59(18) 5589-5595 (2020)

All-optical Ti₃C₂T_x modulator based on a sandwich structure

Erkang Li, Man Jiang, Duidui Li, Ruiduo Wang, Xin Kang, Tianqi Wang, Xiaoxin Yan, Beibei Liu, and Zhaoyu Ren
Appl. Opt. 61(4) 925-930 (2022)

Low-cost and flexible paper-based plasmonic nanostructure for a highly sensitive SERS substrate

Jun Dong, Yi Cao, Jiaxin Yuan, Haoran Wu, Yizhen Zhao, Chenlu Li, Qingyan Han, Wei Gao, Yongkai Wang, and Jianxia Qi
Appl. Opt. 62(3) 560-565 (2023)

Heterogeneous and cross-distributed metal structure hybridized with MoS₂ as high-performance flexible SERS substrate

Xiaofei Zhao, Jing Yu, Zijing Zhang, Chonghui Li, Zhen Li, Shouzhen Jiang, Jie Pan, Aihua Liu, Chao Zhang, and Baoyuan Man
Opt. Express 26(18) 23831-23843 (2018)