A needle-form 3-omega sensor for thermal conductivity measurements of soft materials and biological tissues.

ABSTRACT: Soft materials, liquids, and biological tissues are of increasing interest as thermal materials for applications in energy storage, electrical/electrochemical systems, and cryopreservation, but thermal characterization of these materials can be challenging experimentally. Here, we extend the robust 3-omega method, which is traditionally based on a planar form factor with external sample contact, to a microfabricated needle-form sensor that can be plunged directly into a sample. We further demonstrate the reusability of this sensor, the ability to easily make thermal contact by plunging the sensor into the center of a sample, and the ability to sample systems undergoing phase transformations. We do so via application to solid ice as well as 4 representative materials at room temperature: wa

SUBMITTER: Alliston SP 

PROVIDER: S-EPMC12663592 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature