qPlus型非接触原子力显微技术进展及前沿应用

刘梦溪,李世超,查泽奇,裘晓辉

Research Progress and Applications of qPlus Noncontact Atomic Force Microscopy

Meng-Xi LIU,Shi-Chao LI,Ze-Qi ZHA,Xiao-Hui QIU

图3 分子间化学键高分辨成像

Fig 3 High resolution imaging of the intermolecular chemical bonds (A, B) constant-height NC-AFM image of typical 8-hydroxyquinoline (8-hq) molecule-assembled clusters (CO-tip) and the corresponding structure model; (C, D) constant-height NC-AFM image (CO-tip) and the corresponding density functional theory (DFT) calculated structure models of trimer (Cu3q3) complexes (q, dehydrogenated 8-hq)18; (E) constant-height NC-AFM image of the self-assembly fluoro-substituted phenyleneethynylene (BPEPE-F18), taken with a CO-terminated tip. The unit cell is shown by a black rectangle; (F) magnified NC-AFM image with a superimposed stick-and-ball drawing of the molecules19; (G) AFM image of the bis (para-pyridyl) acetylene (BPPA) tetramer taken with a CO terminated tip showing apparent intermolecular bonds; (H) schematic of the BPPA tetramer21