English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Atomic Force Microscopy (AFM) and Ultrasonic Force Microscopy (UFM) have beenapplied to the characterization of composite samples formed by SrTiO 3 (STO)nanoparticles (NPs) and polyvinyl alcohol (PVA). The morphological features ofthe STO NPs were much better resolved in UFM than in contact-mode AFMtopography. For high STO concentrations the individual STO NPs formednanoclusters, which gathered in microaggregates. The STO aggregates, covered byPVA, exhibited no AFM frictional contrast, but were clearly distinguished fromthe PVA matrix using UFM. Similar aggregation was observed for NPs in thecomposite samples than for NPs deposited on top of a flat silicon substratefrom a milliQ water solution in the absence of polymer. In the hybrid films,most STO nanoparticles typically presented a lower UFM contrast than the PVAmatrix, even though stiffer sample regions such as STO should give rise to ahigher UFM contrast. STO NPs with intermediate contrast were characterized byan UFM halo of lower contrast at the PVA/STO interface. The results may beexplained by considering that ultrasound is effectively damped on the nanometerscale at PVA/ STO interfaces. According to our data, the nanoscale ultrasonicresponse at the PVA/STO interface plays a fundamental role in the UFM imagecontrast.

Ultrasonic force microscopy on 'poly(vinyl alcohol)/SrTiO3' nano-perovskites hybrid films