Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Materials that exhibit negative thermal expansion (NTE) are of fundamental interest due to their rarity and counterintuitive behavior. While research in this area has been directed toward the discovery of materials that display NTE and explaining its origin, there has been less attention to describing the complexities of a secondary phase or other guests that could influence the magnitude and mechanism of NTE. We report herein that zeolite-templated carbon (ZTC), a soft carbonaceous framework solid with ordered microporosity, exhibits a large and widely tunable thermal expansion in the presence of adsorbed guests. For ZTC in the presence of CO 2 at 1 bar, the largest coefficient of isotropic NTE ever observed (−8.4 × 10 –4 K –1 ) is measured between 200 and 220 K. These results comprise a tunable mechanism of thermal expansion based on the interaction between two independent, positively expanding phases that together give rise to an anomalous guest-induced NTE under certain conditions.
Source: ACS Nano
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: U.S. Department of Energy, Office of Science, Office of Energy Efficiency and Renewable Energy, Japan Society for the Promotion of Science, Basic Energy Sciences, Hydrogen and Fuel Cell Technologies Office, Vehicle Technologies Office, Office of Energy Efficiency, SLAC National Accelerator Laboratory
Awards: G1229526393, G1286251239, G2371548206, G262532246, G2701392882, G303061748, G4235786860, G4264918310, G4652047621, G495301720, G498139845, G5570207115, G6550344761, G7283024673, G8312614534, G8382000481, G8842734105, Study on force-responsive soft nanoporous materials, G911061179, G969889393
OpenAlex ID: W7125577830