---
_id: '13385'
abstract:
- lang: eng
  text: Novel light-responsive nanoparticles were synthesized by decorating the surfaces
    of gold and silver nanoparticles with a nitrospiropyran molecular photoswitch.
    Upon exposure to UV light in nonpolar solvents, these nanoparticles self-assembled
    to afford spherical aggregates, which disassembled rapidly when the UV stimulus
    was turned off. The sizes of these aggregates depended on the nanoparticle concentration,
    and their lifetimes could be controlled by adjusting the surface concentration
    of nitrospiropyran on the nanoparticles. The conformational flexibility of nitrospiropyran,
    which was altered by modifying the structure of the background ligand, had a profound
    impact on the self-assembly process. By coating the nanoparticles with a spiropyran
    lacking the nitro group, a conceptually different self-assembly system, relying
    on a reversible proton transfer, was realized. The resulting particles spontaneously
    (in the dark) assembled into aggregates that could be readily disassembled upon
    exposure to blue light.
article_processing_charge: No
article_type: original
author:
- first_name: Pintu K.
  full_name: Kundu, Pintu K.
  last_name: Kundu
- first_name: Sanjib
  full_name: Das, Sanjib
  last_name: Das
- first_name: Johannes
  full_name: Ahrens, Johannes
  last_name: Ahrens
- first_name: Rafal
  full_name: Klajn, Rafal
  id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  last_name: Klajn
citation:
  ama: Kundu PK, Das S, Ahrens J, Klajn R. Controlling the lifetimes of dynamic nanoparticle
    aggregates by spiropyran functionalization. <i>Nanoscale</i>. 2016;8(46):19280-19286.
    doi:<a href="https://doi.org/10.1039/c6nr05959g">10.1039/c6nr05959g</a>
  apa: Kundu, P. K., Das, S., Ahrens, J., &#38; Klajn, R. (2016). Controlling the
    lifetimes of dynamic nanoparticle aggregates by spiropyran functionalization.
    <i>Nanoscale</i>. Royal Society of Chemistry. <a href="https://doi.org/10.1039/c6nr05959g">https://doi.org/10.1039/c6nr05959g</a>
  chicago: Kundu, Pintu K., Sanjib Das, Johannes Ahrens, and Rafal Klajn. “Controlling
    the Lifetimes of Dynamic Nanoparticle Aggregates by Spiropyran Functionalization.”
    <i>Nanoscale</i>. Royal Society of Chemistry, 2016. <a href="https://doi.org/10.1039/c6nr05959g">https://doi.org/10.1039/c6nr05959g</a>.
  ieee: P. K. Kundu, S. Das, J. Ahrens, and R. Klajn, “Controlling the lifetimes of
    dynamic nanoparticle aggregates by spiropyran functionalization,” <i>Nanoscale</i>,
    vol. 8, no. 46. Royal Society of Chemistry, pp. 19280–19286, 2016.
  ista: Kundu PK, Das S, Ahrens J, Klajn R. 2016. Controlling the lifetimes of dynamic
    nanoparticle aggregates by spiropyran functionalization. Nanoscale. 8(46), 19280–19286.
  mla: Kundu, Pintu K., et al. “Controlling the Lifetimes of Dynamic Nanoparticle
    Aggregates by Spiropyran Functionalization.” <i>Nanoscale</i>, vol. 8, no. 46,
    Royal Society of Chemistry, 2016, pp. 19280–86, doi:<a href="https://doi.org/10.1039/c6nr05959g">10.1039/c6nr05959g</a>.
  short: P.K. Kundu, S. Das, J. Ahrens, R. Klajn, Nanoscale 8 (2016) 19280–19286.
date_created: 2023-08-01T09:42:22Z
date_published: 2016-10-19T00:00:00Z
date_updated: 2024-10-14T12:16:21Z
day: '19'
doi: 10.1039/c6nr05959g
extern: '1'
external_id:
  pmid:
  - '27830865'
intvolume: '         8'
issue: '46'
keyword:
- General Materials Science
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1039/C6NR05959G
month: '10'
oa: 1
oa_version: Published Version
page: 19280-19286
pmid: 1
publication: Nanoscale
publication_identifier:
  eissn:
  - 2040-3372
  issn:
  - 2040-3364
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: Controlling the lifetimes of dynamic nanoparticle aggregates by spiropyran
  functionalization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2016'
...