Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/62638
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Chemical defects in the highly fluorescent conjugated polymer dots |
Author: | Clafton, S. Beattie, D. Mierczynska-Vasilev, A. Acres, R. Morgan, A. Kee, T. |
Citation: | Langmuir: the ACS journal of surfaces and colloids, 2010; 26(23):17785-17789 |
Publisher: | Amer Chemical Soc |
Issue Date: | 2010 |
ISSN: | 0743-7463 1520-5827 |
Statement of Responsibility: | Scott N. Clafton, David A. Beattie, Agnieszka Mierczynska-Vasilev, Robert G. Acres, Alan C. Morgan, and Tak W. Kee |
Abstract: | We present strong evidence for the oxidation of conjugated polymers in the formation of conjugated polymer dots (CPdots) using Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Although recent studies show that folding of the polymer chain into a compact 3D structure is involved in the formation of these nanoparticles, the process by which these intrinsically hydrophobic nanoscale particles circumvent aggregation in water is still not well understood. Zeta potential results show that these dots have a negatively charged surface at neutral pH, with a zeta potential and surface charge density of approximately -40 mV and (1.39 - 1.70) × 10(-2) C/m(2), respectively. In addition, quantitative elemental analysis of CPdots indicates that oxygen composes 7-13% of these nanoparticles. The overall results support the presence of chemical defects in forming a hydrophilic surface of CPdots. As a consequence, the charged surface contributes to inhibiting the aggregation of CPdots in water, leading to colloidal stability. |
Keywords: | Oxygen Polymers Colloids Fluorescent Dyes Microscopy, Atomic Force Spectrometry, Fluorescence Spectroscopy, Fourier Transform Infrared Spectrophotometry, Ultraviolet Spectrometry, X-Ray Emission Particle Size Nanotechnology Nanoparticles Hydrophobic and Hydrophilic Interactions |
Rights: | ©2010 American Chemical Society |
DOI: | 10.1021/la103063p |
Published version: | http://dx.doi.org/10.1021/la103063p |
Appears in Collections: | Aurora harvest 5 Environment Institute publications IPAS publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.