Probing viscoelastic response of soft material surfaces at the nanoscale
2016 (English)In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 12, no 2, 619-624 p.Article in journal (Refereed) PublishedText
We study the interaction between an AFM tip and a soft viscoelastic surface. Using a multifrequency method we measure the amplitude-dependence of the cantilever dynamic force quadratures, which clearly show the effect of finite relaxation time of the viscoelastic surface. A model is introduced which treats the tip and surface as a two-body dynamic problem with a nonlinear interaction depending on their separation. We find good agreement between simulations of this model and experimental data on polymer blend samples for a variety of materials and measurement conditions.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 12, no 2, 619-624 p.
IdentifiersURN: urn:nbn:se:kth:diva-180981DOI: 10.1039/c5sm02154eISI: 000367259700035PubMedID: 26479475ScopusID: 2-s2.0-84952304867OAI: oai:DiVA.org:kth-180981DiVA: diva2:898537
Correction in: Soft Matter 12:2, page. 625. Doi: 10.1039/C5SM90197A, WOS: 0003672597000362016-01-282016-01-262016-02-08Bibliographically approved