Tunable 3D light trapping architectures based on self-assembled SnSe2 nanoplate arrays for ultrasensitive SERS detection

Li, Weiwei1,2; Xiong, Lei1,3; Li, Nianci1,4; Pang, Shuo1,2; Xu, Guoliang1,2; Yi, Chenghan1,2; Wang, Zhixun5; Gu, Guoqiang6; Li, Kaiwei7; Li, Weimin1; Wei, Lei5; Li, Guangyuan1; Yang, Chunlei1; Chen, Ming1

2019-09-07

10.1039/c9tc03715b

Journal of Materials Chemistry C   影响因子和分区

2050-7526

2050-7534

Adopting semiconductor materials with light-trapping architectures as the surface-enhanced Raman spectroscopy (SERS)-active substrates has received increasing attention, in which the multiple reflection and scattering of electromagnetic waves can improve the enhancement factor. However, the fabrication of these semiconductor SERS-active substrates commonly requires complicated processes, and these methods normally result in non-uniform and isolated particles/flakes, which have fundamental difficulties in meeting the practical needs in high performance and reliable SERS substrates. Herein, we demonstrate that SnSe2 nanoplate arrays (NPAs) via self-assembled growth can serve as uniform, highly sensitive and reliable SERS substrates. The cavity formed by the SnSe2 NPAs can trap light efficiently (similar to 96%) and thus improve the enhancement factor. Benefiting from the synergistic effect of the charge-transfer process and enhanced light trapping, the resulting SERS substrates based on pure SnSe2 NPAs show an ultralow detection limit (1 x 10(-12) M), a high enhancement factor (6.33 x 10(6)) and excellent uniformity (relative standard deviations down to 7.7%), demonstrating one of the highest sensitivities amongst the reported semiconductor SERS substrates. Furthermore, the effects of different SnSe2 structural configurations (planar vs. cavity), the height and tilt angle of the SnSe2 NPAs on the performance of SERS detection are systematically investigated. It is discovered that the SERS performance is strongly dependent on both the light-trapping ability and the absorption loss. We believe that our results not only provide an effective strategy to obtain tunable, uniform and high performance SERS substrates, but also lead to further understanding of designing 3D light trapping architectures.

SCI ; EI

英语

其他

Nanyang Technological University[M4081515]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000482555200003

ROYAL SOC CHEMISTRY

20193507368137

Architectural acoustics ; Architecture ; Charge transfer ; Electromagnetic waves ; Nanostructures ; Raman spectroscopy ; Selenium compounds ; Semiconductor materials ; Tin compounds

Buildings and Towers:402 ; Electromagnetic Waves:711 ; Semiconducting Materials:712.1 ; Architectural Acoustics:751.3 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Solid State Physics:933

Web of Science

1.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China
2.Univ Sci & Technol China, Dept Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
3.Yunnan Univ, Sch Informat Sci & Engn, Kunming 650500, Yunnan, Peoples R China
4.Univ Chinese Acad Sci, Sch Comp & Control Engn, Beijing 100049, Peoples R China
5.Nanyang Technol Univ, Sch Elect & Electmn Engn, 50 Nanyang Ave, Singapore 639798, Singapore
6.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
7.Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China

Li, Weiwei,Xiong, Lei,Li, Nianci,et al. Tunable 3D light trapping architectures based on self-assembled SnSe2 nanoplate arrays for ultrasensitive SERS detection[J]. Journal of Materials Chemistry C,2019,7(33):10179-10186.

Li, Weiwei.,Xiong, Lei.,Li, Nianci.,Pang, Shuo.,Xu, Guoliang.,...&Chen, Ming.(2019).Tunable 3D light trapping architectures based on self-assembled SnSe2 nanoplate arrays for ultrasensitive SERS detection.Journal of Materials Chemistry C,7(33),10179-10186.

Li, Weiwei,et al."Tunable 3D light trapping architectures based on self-assembled SnSe2 nanoplate arrays for ultrasensitive SERS detection".Journal of Materials Chemistry C 7.33(2019):10179-10186.