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Title: Liquid interfaces with pH-switchable nanoparticle arrays

Abstract

Stimuli-responsive 2D nanoscale systems offer intriguing opportunities for creating switchable interfaces. At liquid interfaces, such systems can provide control over interfacial energies, surface structure, and rheological and transport characteristics, which is relevant, for example, to bio- and chemical reactors, microfluidic devices, and soft robotics. We explore the formation of a pH-responsive membrane formed from gold nanoparticles grafted with DNA (DNA–NPs) at a liquid–vapor interface. A DNA–NP 2D hexagonal lattice can be reversibly switched by pH modulation between an expanded state of non-connected nanoparticles at neutral pH and a contracted state of linked nanoparticles at acidic pH due to the AH +–H +A base pairing between A-motifs. Our in situ surface X-ray scattering studies reveal that the reversible lattice contraction can be tuned by the length of pH-activated linkers, with up to ~71% change in surface area.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Indian Inst. of Technology Bombay, Mumbai (India). Dept. of Physics; Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept. and National Synchrotron Light Source II (NSLS-II)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering and Dept. of Applied Physics and Applied Mathematics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1467849
Alternate Identifier(s):
OSTI ID: 1436356
Report Number(s):
BNL-208018-2018-JAAM
Journal ID: ISSN 1744-683X; SMOABF
Grant/Contract Number:  
SC0012704; AC02-98CH10886; SC0008772
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Soft Matter
Additional Journal Information:
Journal Volume: 14; Journal Issue: 19; Journal ID: ISSN 1744-683X
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 59 BASIC BIOLOGICAL SCIENCES; Self-assembly; Responsive nanostructures; Liquid interfaces; DNA; Nanoparticles

Citation Formats

Srivastava, Sunita, Fukuto, Masafumi, and Gang, Oleg. Liquid interfaces with pH-switchable nanoparticle arrays. United States: N. p., 2018. Web. doi:10.1039/C8SM00583D.
Srivastava, Sunita, Fukuto, Masafumi, & Gang, Oleg. Liquid interfaces with pH-switchable nanoparticle arrays. United States. doi:10.1039/C8SM00583D.
Srivastava, Sunita, Fukuto, Masafumi, and Gang, Oleg. Mon . "Liquid interfaces with pH-switchable nanoparticle arrays". United States. doi:10.1039/C8SM00583D.
@article{osti_1467849,
title = {Liquid interfaces with pH-switchable nanoparticle arrays},
author = {Srivastava, Sunita and Fukuto, Masafumi and Gang, Oleg},
abstractNote = {Stimuli-responsive 2D nanoscale systems offer intriguing opportunities for creating switchable interfaces. At liquid interfaces, such systems can provide control over interfacial energies, surface structure, and rheological and transport characteristics, which is relevant, for example, to bio- and chemical reactors, microfluidic devices, and soft robotics. We explore the formation of a pH-responsive membrane formed from gold nanoparticles grafted with DNA (DNA–NPs) at a liquid–vapor interface. A DNA–NP 2D hexagonal lattice can be reversibly switched by pH modulation between an expanded state of non-connected nanoparticles at neutral pH and a contracted state of linked nanoparticles at acidic pH due to the AH+–H+A base pairing between A-motifs. Our in situ surface X-ray scattering studies reveal that the reversible lattice contraction can be tuned by the length of pH-activated linkers, with up to ~71% change in surface area.},
doi = {10.1039/C8SM00583D},
journal = {Soft Matter},
number = 19,
volume = 14,
place = {United States},
year = {Mon Apr 16 00:00:00 EDT 2018},
month = {Mon Apr 16 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 16, 2019
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