Preparation and characterization of polymer-coated nanoparticles

Daniel B. Wolfe; Stephen J. Oldenburg; Sarah L. Westcott; Joseph B. Jackson; Mark Steven Paley; Naomi J. Halas

doi:10.1117/12.351406

28 June 1999 Preparation and characterization of polymer-coated nanoparticles

Daniel B. Wolfe, Stephen J. Oldenburg, Sarah L. Westcott, Joseph B. Jackson, Mark Steven Paley, Naomi J. Halas

Proceedings Volume 3793, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials; (1999) https://doi.org/10.1117/12.351406
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We report the photodeposition of polymeric layers of nanometer scale thickness onto two nanoparticle substrates. This was accomplished by ultraviolet irradiation of a solution of functionalized diacetylene monomers in which the nanoparticles were suspended. Following photodeposition, the coated nanoparticles were analyzed using transmission electron microscopy and UV-visible spectroscopy. Highly regular polydiacetylene films with thicknesses from 2.5 - 25 nm were produced. The thickness measurements were facilitated by the attachment of small gold nanoparticles onto the surface of silica nanoparticle substrates prior to photodeposition, to provide contrast in the final TEM image. Deposition onto gold nanoshells was also demonstrated. Photodeposition onto these particles resulted in more individual coated particles. Furthermore, short irradiation times (approximately 5 minutes) yielded coated particles without the extra oligomeric contaminants usually found. This substantiates the idea that photodeposition occurs preferentially on a substrate material. UV-visible spectroscopy of the deposited films indicate that approximately 40% less conjugation is present relative to macroscopic polydiacetylene thin films grown with the same approach. This process yields a unique `nanolaminate' coating which may be useful in the modification of the physical, chemical, or optical properties of nanoparticles.

Citation Download Citation

Daniel B. Wolfe, Stephen J. Oldenburg, Sarah L. Westcott, Joseph B. Jackson, Mark Steven Paley, and Naomi J. Halas "Preparation and characterization of polymer-coated nanoparticles", Proc. SPIE 3793, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials, (28 June 1999); https://doi.org/10.1117/12.351406

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available