Self-assembly of L-tryptophan on Cu(111) studied by low-temperature scanning tunneling microscopy

被引：1

作者：

Qiang Xue ^{[1
]}

Yajie Zhang ^{[1
]}

Ruoning Li ^{[1
]}

Chao Li ^{[1
]}

Na Li ^{[1
]}

Chenyang Yuan ^{[1
]}

Shimin Hou ^{[1
,2
]}

Yongfeng Wang ^{[1
,3
]}

机构：

[1] Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University

[2] Peking University Information Technology Institute (Tianjin Binhai)

[3] Beijing Academy of Quantum Information Sciences

来源：

Chinese Chemical Letters | 2019年 / 30卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Scanning tunneling microscopy; Tryptophan; Self-assembly; Surface science; Hexamer;

D O I：

暂无

中图分类号：

TQ226.36 [];

学科分类号：

0817 ;

摘要：

The self-assembly of L-tryptophan on Cu(111) is investigated by an ultrahigh vacuum scanning tunneling microscope(STM) at 4.4 K.When deposited onto the substrate at around 120 K with a coverage of 0.1 monolayer,molecular trimers,tetramers,hexamers,and chains coexist on Cu(111).Then almost all molecules self-assemble into chiral hexamers after being annealed at room temperature.When increasing molecular coverage to the full layer,a new type of chain is observed on the surface.Based on the high-resolution STM images at sub-molecular level,we suggest that the L-tryptophan molecules are present in neutral,zwitterionic or anionic states in these structures.

引用

页码：2355 / 2358

页数：4