TY - JOUR
T1 - Molecular Capacitor Discharge as a Probe of Film Restructuring at Low Temperatures
AU - Sagi, Roey
AU - Akerman, Michelle S.
AU - Tamburu, Carmen
AU - Asscher, Micha
N1 - Publisher Copyright:
© 2023 American Chemical Society
PY - 2024/1/11
Y1 - 2024/1/11
N2 - Discharge of weakly bound, positive, and negative charges upon annealing of atomic and molecular layers that form a nanocapacitor is demonstrated as a sensitive detection method of low-temperature restructuring of films, such as densification, phase transitions, and desorption. This is detected by employing temperature-programmed contact potential difference (TP-ΔCPD) measurements utilizing a Kelvin probe within an ultrahigh-vacuum environment. Onset temperature for the discharge and its profiles are shown to be dependent on the film growth temperature but independent of the charge identity. The discharge is triggered by the restructuring processes, as demonstrated for very different materials─Kr, CD3Cl, and amorphous solid water (ASW) films. The discharge phenomenon leads to a deeper and better understanding of the complex low-temperature processes that take place within molecular films, often at temperatures significantly lower than their onset for desorption.
AB - Discharge of weakly bound, positive, and negative charges upon annealing of atomic and molecular layers that form a nanocapacitor is demonstrated as a sensitive detection method of low-temperature restructuring of films, such as densification, phase transitions, and desorption. This is detected by employing temperature-programmed contact potential difference (TP-ΔCPD) measurements utilizing a Kelvin probe within an ultrahigh-vacuum environment. Onset temperature for the discharge and its profiles are shown to be dependent on the film growth temperature but independent of the charge identity. The discharge is triggered by the restructuring processes, as demonstrated for very different materials─Kr, CD3Cl, and amorphous solid water (ASW) films. The discharge phenomenon leads to a deeper and better understanding of the complex low-temperature processes that take place within molecular films, often at temperatures significantly lower than their onset for desorption.
UR - http://www.scopus.com/inward/record.url?scp=85180995894&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.3c07591
DO - 10.1021/acs.jpcc.3c07591
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AN - SCOPUS:85180995894
SN - 1932-7447
VL - 128
SP - 651
EP - 657
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 1
ER -