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Title: High-density stable glasses formed on soft substrates

Journal Article · · Nature Materials
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1];  [1]; ORCiD logo [4];  [4]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States)
  2. State Univ. of New York (SUNY), Cortland, NY (United States)
  3. Univ. of Pennsylvania, Philadelphia, PA (United States); Seoul National Univ. (Korea, Republic of)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

Enabled by surface-mediated equilibration, physical vapour deposition can create high-density stable glasses comparable with liquid-quenched glasses aged for millions of years. Deposition is often performed at various rates and temperatures on rigid substrates to control the glass properties. Here, in this work, we demonstrate that on soft, rubbery substrates, surface-mediated equilibration is enhanced up to 170 nm away from the interface, forming stable glasses with densities up to 2.5% higher than liquid-quenched glasses within 2.5 h of deposition. Gaining similar properties on rigid substrates would require 10 million times slower deposition, taking ~3,000 years. Controlling the modulus of the rubbery substrate provides control over the glass structure and density at constant deposition conditions. These results underscore the significance of substrate elasticity in manipulating the properties of the mobile surface layer and thus the glass structure and properties, allowing access to deeper states of the energy landscape without prohibitively slow deposition rates.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704
OSTI ID:
2440568
Report Number(s):
BNL--226009-2024-JAAM
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 5 Vol. 23; ISSN 1476-1122
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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