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Li, J., Jahng, J., Pang, J., Morrison, W., Li, J., Lee, ES., Xu, JJ., Chen, HY., Xia, XH.
J Phys Chem Lett
Here we demonstrate sub-10 nm spatial resolution sampling of a volume of ∼360 molecules with a strong field enhancement at the sample-tip junction by implementing noble metal substrates (Au, Ag, Pt) in photoinduced force microscopy (PiFM). This technique shows the versatility and robustness of PiFM and is promising for application in interfacial studies with hypersensitivity and super spatial resolution.