题目：

Concentration Controlled Reversible Phase Transitions in Self-Assembled Monolayer on HOPG Surfaces

作者：

Xueli Shen¹, Xiaodong Wei², Pengli Tan¹, Yingguo Yu², Biao Yang¹, Zhongmiao Gong¹, Haiming Zhang¹, Youyong Li¹, Qing Li^1,*, Yongshu Xie^2,* and Lifeng Chi^1,*

单位：

¹Institute of Functional Nano and Soft Materials (FUNSOM)

Soochow University Suzhou 215123 , P. R. China

²Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology Shanghai 200237 , P. R. China

摘要：

Rational control of molecular ordering on surfaces and interfaces is vital in supramolecular chemistry and nanoscience. Here, a systematic scanning tunneling microscopy (STM) study for controlling the self-assembly behavior of alkoxylated benzene (B-OCn) molecules on a HOPG surface is presented. Three different phases have been observed and, of great importance, they can transform to each other by modifying the solute concentration. Further studies, particularly in situ diluting and concentrating experiments, demonstrate that the transitions among the three phases are highly controllable and reversible, and are driven thermodynamically. In addition, it is found that concentration-controlled reversible phase transitions are general for different chain lengths of B-OCn molecules. Such controllable and reversible phase transitions may have potential applications in the building of desirable functional organic thin films and provide a new understanding in thermodynamically driven self-assembly of organic molecules on surfaces and interfaces.

影响因子：

7.514

分区情况：

1区

链接：

 http://dx.doi.org/10.1002/smll.201402645