Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles]

Nayak, Srikanth; Fieg, Max; Wang, Wenjie; Bu, Wei; Mallapragada, Surya; Vaknin, David

doi:10.1021/acs.langmuir.8b03535

Title: Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles]

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Abstract

Here, we report on the effect of interpolymer complexes (IPCs) of poly(acrylic acid) (PAA) with poly(ethylene glycol)-functionalized Au nanoparticles (PEG-AuNPs) as they assemble at the vapor–liquid interface, using surface-sensitive synchrotron X-ray scattering techniques. Depending on the suspension pH, PAA functions both as a weak polyelectrolyte and a hydrogen bond donor, and these two roles affect the interfacial assembly of PEG-AuNPs differently. Above its isoelectric point, we find that PAA leads to the formation of a PEG-AuNP monolayer at the interface with a hexagonal structure. In the presence of high concentration of HCl (i.e., below the isoelectric point), at which PAA forms IPCs with PEG, the hexagonal structure at the interface appears to deteriorate, concurrent with aggregation in the bulk. Thus, while the electrolytic behavior of PAA induces interfacial assembly, the hydrogen bonding behavior, as PAA becomes neutral, favors the formation of 3D assemblies. For comparison, we also report on the formation of PEG-AuNP monolayers (in the absence of PAA) with strong electrolytes such as HCl, H₂SO₄, and NaOH that lead to a high degree of crystallinity.

Authors:

Nayak, Srikanth ^[1]; Fieg, Max ^[1]; Wang, Wenjie ^[2];

^[3];

^[1];

^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab., Ames, IA (United States)
Univ. of Chicago, Chicago, IL (United States)

Publication Date:: Thu Jan 10 00:00:00 EST 2019

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1494940

Report Number(s):: IS-J-9847
Journal ID: ISSN 0743-7463

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Langmuir

Additional Journal Information:: Journal Volume: 35; Journal Issue: 6; Journal ID: ISSN 0743-7463

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Nayak, Srikanth, Fieg, Max, Wang, Wenjie, Bu, Wei, Mallapragada, Surya, and Vaknin, David. Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles].  United States: N. p., 2019. 
Web.  doi:10.1021/acs.langmuir.8b03535.

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                    Nayak, Srikanth, Fieg, Max, Wang, Wenjie, Bu, Wei, Mallapragada, Surya, & Vaknin, David. Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles].  United States.  https://doi.org/10.1021/acs.langmuir.8b03535

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                    Nayak, Srikanth, Fieg, Max, Wang, Wenjie, Bu, Wei, Mallapragada, Surya, and Vaknin, David. Thu .  
"Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles]".  United States.  https://doi.org/10.1021/acs.langmuir.8b03535.  https://www.osti.gov/servlets/purl/1494940.

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@article{osti_1494940,

  title        = {Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles]},

  author       = {Nayak, Srikanth and Fieg, Max and Wang, Wenjie and Bu, Wei and Mallapragada, Surya and Vaknin, David},

  abstractNote = {Here, we report on the effect of interpolymer complexes (IPCs) of poly(acrylic acid) (PAA) with poly(ethylene glycol)-functionalized Au nanoparticles (PEG-AuNPs) as they assemble at the vapor–liquid interface, using surface-sensitive synchrotron X-ray scattering techniques. Depending on the suspension pH, PAA functions both as a weak polyelectrolyte and a hydrogen bond donor, and these two roles affect the interfacial assembly of PEG-AuNPs differently. Above its isoelectric point, we find that PAA leads to the formation of a PEG-AuNP monolayer at the interface with a hexagonal structure. In the presence of high concentration of HCl (i.e., below the isoelectric point), at which PAA forms IPCs with PEG, the hexagonal structure at the interface appears to deteriorate, concurrent with aggregation in the bulk. Thus, while the electrolytic behavior of PAA induces interfacial assembly, the hydrogen bonding behavior, as PAA becomes neutral, favors the formation of 3D assemblies. For comparison, we also report on the formation of PEG-AuNP monolayers (in the absence of PAA) with strong electrolytes such as HCl, H2SO4, and NaOH that lead to a high degree of crystallinity.},

  doi          = {10.1021/acs.langmuir.8b03535},

  journal      = {Langmuir},

  number       = 6,

  volume       = 35,

  place        = {United States},

  year         = {Thu Jan 10 00:00:00 EST 2019},

  month        = {Thu Jan 10 00:00:00 EST 2019}

}

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