Templating CdSe tetrapods at the air/water interface with POPC lipids

Journal of Colloid and Interface Science
Kung-Po ChaoSibani L Biswal

Abstract

Surfactants have been widely used as templating agents to pattern the orientation of nanoparticles of various conformations. Here we report the use of a lipid, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), as a template to order CdSe tetrapods (TPs) at the air/water interface using a Langmuir-Blodgett trough. The surface pressure versus area isotherms for CdSe TPs and CdSe TPs/POPC are examined and monitored by Brewster angle microscopy (BAM). The transferred thin films are further characterized by transmission electron microscopy (TEM) and atomic force microscopy (AFM). Initially disc-like structures containing randomly oriented TPs form during solvent evaporation. Upon decreasing surface area, these discs merge into larger continental structures. In a mixed CdSe TPs/POPC system, these discs organize into wire-like networks upon compression. We detail how lipid molecules can be used to direct the two-dimensional assembly of TPs.

References

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Mar 30, 2002·Science·Wendy U HuynhA Paul Alivisatos
Mar 5, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Christian Rein HansenThomas Bjørnholm
Jul 16, 2009·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Zhining Wang, Shihe Yang
Feb 16, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Alina MogilevskyRaz Jelinek
Nov 6, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Alina Mogilevsky, Raz Jelinek

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Citations

Apr 2, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Kung-Po Chao, Sibani L Biswal
May 3, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Thabo J MatshayaRaquel V Vico
Apr 20, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jimmie Mitchell, Jeffrey J Weimer

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