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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Diffusing wave spectroscopy (DWS) can be employed as an optical rheology toolwith numerous applications for studying the structure, dynamics and linearviscoelastic properties of complex fluids, foams, glasses and gels. To carryout DWS measurements, one first needs to quantify the static optical propertiesof the sample under investigation, i.e. the transport mean free path $l^\ast$and the absorption length $l_a$. In the absence of absorption this can be doneby comparing the diffuse optical transmission to a calibration sample whose$l^\ast$ is known. Performing this comparison however is cumbersome, timeconsuming and prone to mistakes by the operator. Moreover, already weakabsorption can lead to significant errors. In this paper, we demonstrate theimplementation of an automatized approach, based on which the DWS measurementprocedure can be simplified significantly. By comparison with a comprehensiveset of calibration measurements we cover the entire parameter space relatingmeasured count rates (CR$_t$, CR$_b$) to ($l^\ast$, $l_a$). Based on thisapproach we can determine $l^\ast$ and $l_a$ of an unknown sample accuratelythus making the additional measurement of a calibration sample obsolete. Weillustrate the use of this approach by monitoring the coarsening of acommercially available shaving foam with DWS.

Improved diffusing wave spectroscopy based on the automatized determination of the optical transport and absorption mean free path