[11p-N302-1~13] 17.3 Layered materials

▲ [11p-N302-9] UV/Thermally Induced Isomerization of Spiropyran on MoS₂ Lattice

〇(D)MuhammadShamimAl Mamun¹, Yasuyuki Sainoo², Tsuyoshi Takaoka², Hiroki Waizumi¹, Zhipeng Wang¹, Md Iftekharul Alam¹, Kosei Takahashi¹, Atsushi Ando³, Ryuichi Arafune⁴, Tadahiro Komeda² (1.Tohoku University, 2.IMRAM, Tagen, 3.AIST, 4.NIMS)

Keywords:Spiropyran, Isomerization, Activation barrier

Nanotechnology is being considered as a mainstream technology of the 21^st century due to its aspects of observing and modifying matter at the nano level.¹ Molecules with very specific functional groups can be modulated by outside stimuli are of great interest for sensing and optoelectronics.² In this report, we observe the photo/thermal induced structural switching of spiropyran (1′,3′-Dihydro-1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-(2H)-indole]) molecule through electrical property measurement by MoS₂-FET. Well controlled functionalization of MoS₂ by spiropyran (SP) can be possible by the external photon irradiation. The conformational change of the spiropyran between spiropyran and merocyanine (MC) was monitored. TOF-SIMS measurement confirms the presence of spiropyran over the MoS₂ after functionalization. Raman spectroscopy confirms the n-doping of both SP and MC.