Asset Details
Do you wish to reserve the book?
Colossal positive and negative thermal expansion and thermosalient effect in a pentamorphic organometallic martensite
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Colossal positive and negative thermal expansion and thermosalient effect in a pentamorphic organometallic martensite
Do you wish to request the book?
Colossal positive and negative thermal expansion and thermosalient effect in a pentamorphic organometallic martensite
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Colossal positive and negative thermal expansion and thermosalient effect in a pentamorphic organometallic martensite
2014
Overview
The thermosalient effect is an extremely rare propensity of certain crystalline solids for self-actuation by elastic deformation or by a ballistic event. Here we present direct evidence for the driving force behind this impressive crystal motility. Crystals of a prototypical thermosalient material, (phenylazophenyl)palladium hexafluoroacetylacetonate, can switch between five crystal structures (α—ε) that are related by four phase transitions including one thermosalient transition (α↔γ). The mechanical effect is driven by a uniaxial negative expansion that is compensated by unusually large positive axial expansion (260 × 10
–6
K
–1
) with volumetric expansion coefficients (≈250 × 10
–6
K
–1
) that are among the highest values reported in molecular solids thus far. The habit plane advances at ~10
4
times the rate observed with non-thermosalient transitions. This rapid expansion of the crystal following the phase switching is the driving force for occurrence of the thermosalient effect.
The thermosalient effect is the unusual tendency of some crystals to visibly jump during phase changes. Here, the authors study the multiple phase changes in a prototypic thermosalient material and provide evidence for the factors that drive this self-actuation.
Publisher
Nature Publishing Group UK,Nature Publishing Group
