Surface modification studies of edge-oriented molybdenum sulfide nanosheets.
We have synthesized edge-oriented MoS2 nanosheets by the evaporation of a single source precursor based on Mo(IV)-tetrakis(diethylaminodithiocarbomato). The surface chemistry of the MoS2 nanosheets has been studied in order to evaluate the chemical reactivities of the basal planes and edges. By irradiating the MoS2 nanosheet with a scanning infrared laser, micron-scale lithographical structures can be created due to laser-induced oxidation of MoS2 to form nanocrystalline MoO3. Preferential reactivities of the MoS2 basal edges in an electrochemical environment and during vapor phase deposition have been demonstrated. Functionalization of the basal plane with 1-pyrene acetic acid allows the immobilization of DNA and immunoglobins on the MoS2 basal plane.
Zhang
Heng
H
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
Loh
Kian Ping
KP
Sow
Chorng Haur
CH
Gu
Huiru
H
Su
Xiaodi
X
Huang
Chun
C
Chen
Zhi Kuan
ZK