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Title: Scaling Laws for Polymer Chains Grafted onto Nanoparticles

Abstract

An experimental approach is presented for identifying the scaling laws for polymer chains grafted onto gold nanoparticles. Poly(ethylene oxide) of various molecular weights are grafted onto gold nanoparticles via thiol end-functional groups. The polymer-grafted nanoparticles are self-assembled into monolayers from solvents of different quality. Over a significant range of graft densities, nanoparticle monolayers deposited from good (athermal) solvent exhibit particle spacing that scales according to theoretical predictions for chains in dilute solution. This unexpected result for ordered nanoparticle monolayers is discussed in the context of the deposition process. In monolayers deposited from theta solvent, molecular weight scaling of particle spacing breaks down, possibly due to chain length dependence of solvent quality. In poor solvent, the structure of nanoparticle assemblies is not sufficiently ordered to obtain reliable measurements, possibly due to loss of nanoparticle dispersion. This approach opens up the possibility for accurate measurement of the effect of solvent on grafted chain scaling in nanoparticle assemblies.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
  1. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1474497
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Macromolecular Chemistry and Physics
Additional Journal Information:
Journal Volume: 219; Journal Issue: 8; Journal ID: ISSN 1022-1352
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Yang, Guang, Kim, Kyoungmin, Wang, Wentao, Chen, Banghao, Mattoussi, Hedi, and Hallinan, Daniel T. Scaling Laws for Polymer Chains Grafted onto Nanoparticles. United States: N. p., 2018. Web. doi:10.1002/macp.201700417.
Yang, Guang, Kim, Kyoungmin, Wang, Wentao, Chen, Banghao, Mattoussi, Hedi, & Hallinan, Daniel T. Scaling Laws for Polymer Chains Grafted onto Nanoparticles. United States. doi:10.1002/macp.201700417.
Yang, Guang, Kim, Kyoungmin, Wang, Wentao, Chen, Banghao, Mattoussi, Hedi, and Hallinan, Daniel T. Fri . "Scaling Laws for Polymer Chains Grafted onto Nanoparticles". United States. doi:10.1002/macp.201700417. https://www.osti.gov/servlets/purl/1474497.
@article{osti_1474497,
title = {Scaling Laws for Polymer Chains Grafted onto Nanoparticles},
author = {Yang, Guang and Kim, Kyoungmin and Wang, Wentao and Chen, Banghao and Mattoussi, Hedi and Hallinan, Daniel T.},
abstractNote = {An experimental approach is presented for identifying the scaling laws for polymer chains grafted onto gold nanoparticles. Poly(ethylene oxide) of various molecular weights are grafted onto gold nanoparticles via thiol end-functional groups. The polymer-grafted nanoparticles are self-assembled into monolayers from solvents of different quality. Over a significant range of graft densities, nanoparticle monolayers deposited from good (athermal) solvent exhibit particle spacing that scales according to theoretical predictions for chains in dilute solution. This unexpected result for ordered nanoparticle monolayers is discussed in the context of the deposition process. In monolayers deposited from theta solvent, molecular weight scaling of particle spacing breaks down, possibly due to chain length dependence of solvent quality. In poor solvent, the structure of nanoparticle assemblies is not sufficiently ordered to obtain reliable measurements, possibly due to loss of nanoparticle dispersion. This approach opens up the possibility for accurate measurement of the effect of solvent on grafted chain scaling in nanoparticle assemblies.},
doi = {10.1002/macp.201700417},
journal = {Macromolecular Chemistry and Physics},
number = 8,
volume = 219,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 3 works
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Figures / Tables:

Table 1 Table 1: PEO ligand properties.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.