Monolayer of amphiphilic functionalized gold nanoparticles at an air-water interface

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3684

Title:	Monolayer of amphiphilic functionalized gold nanoparticles at an air-water interface
Authors:	Gupta, Raj Kumar Suresh, K.A. Kumar, Sandeep
Issue Date:	18-Sep-2008
Publisher:	American Physical Society
Citation:	Physical Review E, 2008, Vol.78, p032601
Abstract:	Langmuir films at the air-water interface exhibit a variety of surface phases which arise primarily due to the molecular interaction governed by intermolecular separation. We have studied the thermodynamical aspects of Langmuir monolayers of amphiphilic functionalized gold nanoparticles (AGNs) at the air-water (A-W) interface. Interestingly, the AGN monolayer exhibits phases like gas, a low-ordered liquid (L1), a high-ordered liquid (L2), and a collapsed state. We find that the first-order phase transition between L1 and L2 vanishes above a critical temperature of 28.4 °C. Surprisingly, for a range of higher temperatures (>=29.4 °C and <=36.3 °C), the L1 phase undergoes a transition to a bilayer of the L2 phase before entering into the collapsed state. ©2008 The American Physical Society
Description:	Open Access
URI:	http://hdl.handle.net/2289/3684
ISSN:	E-ISSN: 1550-2376 P-ISSN: 1539-3755
Alternative Location:	http://dx.doi.org/10.1103/PhysRevE.78.032601
Copyright:	2008 The American Physical Society
Appears in Collections:	Research Papers (SCM)

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