摘要
Tip-enhanced infrared(IR)spectra and imaging have been widely used in cutting-edge studies for the in-depth understanding of the composition,structure,and function of interfaces at the nanoscale.However,molecular monolayer sensitivity has only been demonstrated at solid/gas interfaces.In an aqueous environment,reduced sensitivity limits the practical applications of tip-enhanced IR nanospectroscopy.Here,we present an approach to hypersensitive nanoscale IR spectra and imaging in an aqueous environment with a combination of photoinduced force(PiF)microscopy and resonant antennas.
基金
supported by grants from the National Key Research and Development Program of China(no.2017YFA0206500)
the National Natural Science Foundation of China(no.21635004,22004069)
the Excellent Research Program of Nanjing University(no.ZYJH004)
the State Key Laboratory of Analytical Chemistry for Life Science(no.5431ZZXM2001).
