Light-induced reversible hydrophobization of cationic gold nanoparticles via electrostatic adsorption of a photoacid

Tutkimustuotos: Lehtiartikkeli

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@article{7d705833ce1749668dda3af69bf100c1,
title = "Light-induced reversible hydrophobization of cationic gold nanoparticles via electrostatic adsorption of a photoacid",
abstract = "The ability to switch the hydrophilicity/hydrophobicity of nanoparticles promises great potential for applications. Here we report a generic approach that allows hydrophobization of cationic surfaces by light-induced photoacid switching from the unbound zwitterionic form to the electrostatically bound anionic form. Importantly, this allows reversible assembly and disassembly of cationic AuNPs, with disassembly kinetics controlled by temperature. The AuNPs can be repeatedly transferred between aqueous and non-polar solvents using light, showing potential in purification processes. In the macroscopic scale, nontrivially, light triggers the in situ hydrophobization of a flat cationized gold surface. The current approach is generic and opens up a new way to control the surface properties and self-assembly of nanoparticles.",
author = "Hang Zhang and Junaid Muhammad and Kai Liu and Ras, {Robin H.A.} and Olli Ikkala",
note = "| openaire: EC/H2020/725513/EU//SuperRepel | openaire: EC/H2020/742829/EU//DRIVEN",
year = "2019",
month = "8",
day = "1",
doi = "10.1039/c9nr05416b",
language = "English",
volume = "11",
pages = "14118--14122",
journal = "Nanoscale",
issn = "2040-3364",
number = "30",

}

RIS - Lataa

TY - JOUR

T1 - Light-induced reversible hydrophobization of cationic gold nanoparticles via electrostatic adsorption of a photoacid

AU - Zhang, Hang

AU - Muhammad, Junaid

AU - Liu, Kai

AU - Ras, Robin H.A.

AU - Ikkala, Olli

N1 - | openaire: EC/H2020/725513/EU//SuperRepel | openaire: EC/H2020/742829/EU//DRIVEN

PY - 2019/8/1

Y1 - 2019/8/1

N2 - The ability to switch the hydrophilicity/hydrophobicity of nanoparticles promises great potential for applications. Here we report a generic approach that allows hydrophobization of cationic surfaces by light-induced photoacid switching from the unbound zwitterionic form to the electrostatically bound anionic form. Importantly, this allows reversible assembly and disassembly of cationic AuNPs, with disassembly kinetics controlled by temperature. The AuNPs can be repeatedly transferred between aqueous and non-polar solvents using light, showing potential in purification processes. In the macroscopic scale, nontrivially, light triggers the in situ hydrophobization of a flat cationized gold surface. The current approach is generic and opens up a new way to control the surface properties and self-assembly of nanoparticles.

AB - The ability to switch the hydrophilicity/hydrophobicity of nanoparticles promises great potential for applications. Here we report a generic approach that allows hydrophobization of cationic surfaces by light-induced photoacid switching from the unbound zwitterionic form to the electrostatically bound anionic form. Importantly, this allows reversible assembly and disassembly of cationic AuNPs, with disassembly kinetics controlled by temperature. The AuNPs can be repeatedly transferred between aqueous and non-polar solvents using light, showing potential in purification processes. In the macroscopic scale, nontrivially, light triggers the in situ hydrophobization of a flat cationized gold surface. The current approach is generic and opens up a new way to control the surface properties and self-assembly of nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=85070852432&partnerID=8YFLogxK

U2 - 10.1039/c9nr05416b

DO - 10.1039/c9nr05416b

M3 - Article

VL - 11

SP - 14118

EP - 14122

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 30

ER -

ID: 36531337