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Mechanical Properties Of Carbon-Based Nanocomposites For Sensors Used In Biomedical Applications

UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE(2021)

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摘要
In this paper, we present our initial findings related to the response of carbon nanohorns nanocomposites, processed as films with polyvinylpyrrolidone as matrix. Films having 1-8 sensitive layers (denoted 1L, 2L, 3L, 4L, 5L, 6L, 7L and 8L) of composite were subjected to mechanical stress and various temperature changes. A quick mechanical stress test was made by applying different loads (2 N, 5 N, 10 N and 20 N). We obtained Young elasticity modulus of 8.33 MPa (1L) and 3.99 MPa (8L). The electrical resistances of the sensors were measured for each deposition, showing a decrease from 838 Omega to 562 Omega (from 1L to 8L deposited). Optical microscopy images showed that the solution used as sensitive layer is resistant to temperatures from +50 degrees C to -50 degrees C.
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关键词
Oxidized carbon nanohorns, PVP-carbon nanohorns composite films, static mechanical load vs. deformation, deformation vs. film thickness, behavior at thermal cycling
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