dc.publisher: Nature Publishing Group access_endpoint: https://www.nature.com/platform/readcube-access og:image: https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41467-018-04854-w/MediaObjects/41467_2018_4854_Fig1_HTML.png WT.cg_s: Article twitter:card: summary og:site_name: Nature Communications citation_reference: citation_journal_title=J. Control Release; citation_title=Biodegradable polymeric nanoparticles as drug delivery devices; citation_author=KS Soppimath, TM Aminabhavi, AR Kulkarni, WE Rudzinski; citation_volume=70; citation_publication_date=2001; citation_pages=1-20; citation_doi=10.1016/S0168-3659(00)00339-4; citation_id=CR1 citation_journal_title: Nature Communications dc.rights: ©2019 Macmillan Publishers Limited. All Rights Reserved. og:description: Measuring polymer surface dynamics is a challenge of importance to applications ranging from pressure-sensitive adhesives to nanopatterning. Here, the authors introduce a methodology of Brillouin light spectroscopy to reveal polymer surface mobility via nanoparticle vibrations. prism.issn: 2041-1723 WT.cg_n: Nature Communications prism.number: 1 citation_issn: 2041-1723 WT.z_subject_term_id: chemistry;engineering;nanoscience-and-technology dc:title: Direct observation of polymer surface mobility via nanoparticle vibrations | Nature Communications Content-Encoding: UTF-8 WT.z_cg_type: Nature Research Journals citation_pdf_url: https://www.nature.com/articles/s41467-018-04854-w.pdf robots: noarchive WT.z_primary_atype: Research DOI: 10.1038/s41467-018-04854-w citation_fulltext_world_readable: prism.rightsAgent: permissions@nature.com citation_author: Hojin Kim dc.date: 2018-07-25 WT.z_subject_term: Chemistry;Engineering;Nanoscience and technology WT.z_bandiera_abtest: a citation_issue: 1 prism.volume: 9 WT.template: oscar prism.publicationName: Nature Communications citation_doi: 10.1038/s41467-018-04854-w dc.title: Direct observation of polymer surface mobility via nanoparticle vibrations prism.url: https://www.nature.com/articles/s41467-018-04854-w citation_volume: 9 dc.language: En Content-Language: en msapplication-TileImage: /static/images/favicons/nature/favicon-144x144.3e61d1f755.png theme-color: #940720 citation_title: Direct observation of polymer surface mobility via nanoparticle vibrations citation_author_institution: Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, USA access: Yes citation_publisher: Nature Publishing Group dc.format: text/html description: Article title: Direct observation of polymer surface mobility via nanoparticle vibrations | Nature Communications twitter:image: https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-018-04854-w/MediaObjects/41467_2018_4854_Fig1_HTML.png citation_online_date: 2018/07/25 twitter:site: @NatureComms dc.source: Nature Communications 2018 9:1 dc.type: OriginalPaper dc.copyright: 2018 The Author(s) dc.creator: Hojin Kim citation_fulltext_html_url: https://www.nature.com/articles/s41467-018-04854-w WT.page_categorisation: Article_HTML prism.publicationDate: 2018-07-25 Content-Type: text/html; charset=UTF-8 journal_id: 41467 X-Parsed-By: org.apache.tika.parser.DefaultParser dc.description: Measuring polymer surface dynamics remains a formidable challenge of critical importance to applications ranging from pressure-sensitive adhesives to nanopatterning, where interfacial mobility is key to performance. Here, we introduce a methodology of Brillouin light spectroscopy to reveal polymer surface mobility via nanoparticle vibrations. By measuring the temperature-dependent vibrational modes of polystyrene nanoparticles, we identify the glass-transition temperature and calculate the elastic modulus of individual nanoparticles as a function of particle size and chemistry. Evidence of surface mobility is inferred from the first observation of a softening temperature, where the temperature dependence of the fundamental vibrational frequency of the nanoparticles reverses slope below the glass-transition temperature. Beyond the fundamental vibrational modes given by the shape and elasticity of the nanoparticles, another mode, termed the interaction-induced mode, was found to be related to the active particle?particle adhesion and dependent on the thermal behavior of nanoparticles. twitter:title: Direct observation of polymer surface mobility via nanoparticle vibrat og:type: article citation_article_type: Article og:title: Direct observation of polymer surface mobility via nanoparticle vibrations prism.doi: doi:10.1038/s41467-018-04854-w msapplication-TileColor: #940720 X-UA-Compatible: IE=edge citation_firstpage: 2918 WT.z_cc_license_type: cc_by prism.startingPage: 2918 viewport: width=device-width,initial-scale=1.0,maximum-scale=2.5,user-scalable=yes twitter:description: Measuring polymer surface dynamics is a challenge of importance to applications ranging from pressure-sensitive adhesives to nanopatterning. Here, the authors introduce a methodology of Brillouin light spectroscopy to reveal polymer surface mobility via nanoparticle vibrations. dc.rightsAgent: permissions@nature.com prism.section: OriginalPaper dc.identifier: doi:10.1038/s41467-018-04854-w dc.subject: Chemistry og:url: https://www.nature.com/articles/s41467-018-04854-w prism.copyright: 2018 The Author(s)