Modifying the STM Tip for the 'Ultimate' Imaging of the Si(111)-7x7 Surface and Metal-supported Molecules

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	Modifying the STM Tip for the 'Ultimate' Imaging of the Si(111)-7x7 Surface and Metal-supported Molecules
	Wang, YL ; Cheng, ZH ; Deng, ZT ; Guo, HM ; Du, SX ; Gao, HJ
刊名	CHIMIA
	2012
卷号	66 期号:1-2 页码:31
关键词	SCANNING-TUNNELING-MICROSCOPY SILICON (111)-(7X7) SURFACE ATOMIC-FORCE MICROSCOPY SINGLE-MOLECULE ELECTRONIC-STRUCTURE IRON PHTHALOCYANINE ORGANIC-MOLECULES AU(111) SURFACE REAL SPACE CO
ISSN号	0009-4293
通讯作者	Gao, HJ: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We report on high-resolution STM measurements with modified probe tips. First, both the rest atoms and adatoms of a Si(111)-7x7 surface are observed simultaneously. The visibility of rest atoms is dependent upon the sample bias voltage (less than -0.7 V) and is enhanced by sharpening the tip, which is rationalized by first-principles calculations. Second, a tip with a perylene molecule adsorbed at its apex is used to discriminate the molecular states and the metal states of the underlying Ag(110) surface, which is attributable to a mismatch between the energy levels of the functionalized tip and the adsorbates on silver. Lastly, high-resolution images of iron phthalocyanine (FePc) and zinc phthalocyanine (ZnPc) molecules on Au(111) are obtained by using an O-2-terminated tip, and the images reveal rich intramolecular features arising from molecular orbitals that are not observed when using clean metallic tips.
收录类别	SCI
资助信息	CAS; NSFC; "863" project of China; "973" project of China
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/42229]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, YL,Cheng, ZH,Deng, ZT,et al. Modifying the STM Tip for the 'Ultimate' Imaging of the Si(111)-7x7 Surface and Metal-supported Molecules[J]. CHIMIA,2012,66(1-2):31.
APA	Wang, YL,Cheng, ZH,Deng, ZT,Guo, HM,Du, SX,&Gao, HJ.(2012).Modifying the STM Tip for the 'Ultimate' Imaging of the Si(111)-7x7 Surface and Metal-supported Molecules.CHIMIA,66(1-2),31.
MLA	Wang, YL,et al."Modifying the STM Tip for the 'Ultimate' Imaging of the Si(111)-7x7 Surface and Metal-supported Molecules".CHIMIA 66.1-2(2012):31.