TY - JOUR
T1 - Enhancing charge transfer with foreign molecules through femtosecond laser induced MoS 2 defect sites for photoluminescence control and SERS enhancement
AU - Zuo, Pei
AU - Jiang, Lan
AU - Li, Xin
AU - Ran, Peng
AU - Li, Bo
AU - Song, Aisheng
AU - Tian, Mengyao
AU - Ma, Tianbao
AU - Guo, Baoshan
AU - Qu, Liangti
AU - Lu, Yongfeng
N1 - Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019/1/14
Y1 - 2019/1/14
N2 - Defect/active site control is crucial for tuning the chemical, optical, and electronic properties of MoS 2 , which can adjust the performance of MoS 2 in application areas such as electronics, optics, catalysis, and molecular sensing. This study presents an effective method of inducing defect/active sites, including micro/nanofractured structures and S atomic vacancies, on monolayer MoS 2 flakes by using femtosecond laser pulses, through which physical-chemical adsorption and charge transfer between foreign molecules (O 2 or R6G molecules) and MoS 2 are enhanced. The enhanced charge transfer between foreign molecules (O 2 or R6G) and femtosecond laser-treated MoS 2 can enhance the electronic doping effect between them, hence resulting in a photoluminescence photon energy shift (reaching 0.05 eV) of MoS 2 and Raman enhancement (reaching 6.4 times) on MoS 2 flakes for R6G molecule detection. Finally, photoluminescence control and micropatterns on MoS 2 and surface-enhanced-Raman-scattering (SERS) enhancement of MoS 2 for organic molecule detection are achieved. The proposed method, which can control the photoluminescence properties and arbitrary micropatterns on MoS 2 and enhance its chemicobiological sensing performance for organic/biological molecules, has advantages of simplicity, maskless processing, strong controllability, high precision, and high flexibility, highlighting the superior ability of femtosecond laser pulses to achieve the property control and functionalization of two-dimensional materials.
AB - Defect/active site control is crucial for tuning the chemical, optical, and electronic properties of MoS 2 , which can adjust the performance of MoS 2 in application areas such as electronics, optics, catalysis, and molecular sensing. This study presents an effective method of inducing defect/active sites, including micro/nanofractured structures and S atomic vacancies, on monolayer MoS 2 flakes by using femtosecond laser pulses, through which physical-chemical adsorption and charge transfer between foreign molecules (O 2 or R6G molecules) and MoS 2 are enhanced. The enhanced charge transfer between foreign molecules (O 2 or R6G) and femtosecond laser-treated MoS 2 can enhance the electronic doping effect between them, hence resulting in a photoluminescence photon energy shift (reaching 0.05 eV) of MoS 2 and Raman enhancement (reaching 6.4 times) on MoS 2 flakes for R6G molecule detection. Finally, photoluminescence control and micropatterns on MoS 2 and surface-enhanced-Raman-scattering (SERS) enhancement of MoS 2 for organic molecule detection are achieved. The proposed method, which can control the photoluminescence properties and arbitrary micropatterns on MoS 2 and enhance its chemicobiological sensing performance for organic/biological molecules, has advantages of simplicity, maskless processing, strong controllability, high precision, and high flexibility, highlighting the superior ability of femtosecond laser pulses to achieve the property control and functionalization of two-dimensional materials.
UR - http://www.scopus.com/inward/record.url?scp=85059500805&partnerID=8YFLogxK
U2 - 10.1039/c8nr08785g
DO - 10.1039/c8nr08785g
M3 - Article
C2 - 30543248
AN - SCOPUS:85059500805
SN - 2040-3364
VL - 11
SP - 485
EP - 494
JO - Nanoscale
JF - Nanoscale
IS - 2
ER -