Coverage dependent adsorption dynamics in hyperthermal organic thin film growth

A. Amassian; T. V. Desai; S. Kowarik; S. Hong; A. R. Woll; G. G. Malliaras; F. Schreiber; J. R. Engstrom

doi:10.1063/1.3088835

Coverage dependent adsorption dynamics in hyperthermal organic thin film growth

A. Amassian, T. V. Desai, S. Kowarik, S. Hong, A. R. Woll, G. G. Malliaras, F. Schreiber, J. R. Engstrom

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We have examined the dynamics of adsorption of diindenoperylene (DIP) on SiO₂ and SiO₂ modified with an interfacial organic layer using in situ real time synchrotron x-ray scattering, focusing on the effects of coverage. On both surfaces we observe a substantial increase in the probability of adsorption with increasing coverage, which is most dramatic at the highest incident kinetic energies. On the initially uncovered surfaces, we observe a smooth decrease in the probability of adsorption with increasing incident kinetic energy, indicative of trapping-mediated adsorption. Once both surfaces are covered by DIP, the effects of incident kinetic energy are greatly reduced, and trapping is very efficient over the range of kinetic energies examined. Possible reasons for efficient trapping at high coverage and at high incident kinetic energy include more efficient momentum transfer due to mass matching, and possibly direct molecular insertion. Comparison to results on another small-molecule, pentacene, suggests that this behavior should be common to hyperthermal growth of a variety of other small-molecule thin films.

Original language	English (US)
Article number	124701
Journal	JOURNAL OF CHEMICAL PHYSICS
Volume	130
Issue number	12
DOIs	https://doi.org/10.1063/1.3088835
State	Published - 2009

Bibliographical note

Funding Information:
This work was supported by the Cornell Center for Materials Research, a National Science Foundation MRSEC (Grant No. NSF-DMR-0520404), and was performed in part at the Cornell High Energy Synchrotron Source, also supported by the NSF and NIH-NIGMS (Grant No. NSF-DMR-0225180). J.R.E. would like to also acknowledge supplementary support via NSF-ECS-0210693 and NSF-CTS-0529042. S.H. and A.A. would like to acknowledge the Korea Research Foundation (Grant No. KRF-2006-352-D00108) and the Natural Sciences and Engineering Council of Canada, respectively, for post-doctoral fellowships.

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.3088835

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title = "Coverage dependent adsorption dynamics in hyperthermal organic thin film growth",

abstract = "We have examined the dynamics of adsorption of diindenoperylene (DIP) on SiO2 and SiO2 modified with an interfacial organic layer using in situ real time synchrotron x-ray scattering, focusing on the effects of coverage. On both surfaces we observe a substantial increase in the probability of adsorption with increasing coverage, which is most dramatic at the highest incident kinetic energies. On the initially uncovered surfaces, we observe a smooth decrease in the probability of adsorption with increasing incident kinetic energy, indicative of trapping-mediated adsorption. Once both surfaces are covered by DIP, the effects of incident kinetic energy are greatly reduced, and trapping is very efficient over the range of kinetic energies examined. Possible reasons for efficient trapping at high coverage and at high incident kinetic energy include more efficient momentum transfer due to mass matching, and possibly direct molecular insertion. Comparison to results on another small-molecule, pentacene, suggests that this behavior should be common to hyperthermal growth of a variety of other small-molecule thin films.",

author = "A. Amassian and Desai, {T. V.} and S. Kowarik and S. Hong and Woll, {A. R.} and Malliaras, {G. G.} and F. Schreiber and Engstrom, {J. R.}",

note = "Funding Information: This work was supported by the Cornell Center for Materials Research, a National Science Foundation MRSEC (Grant No. NSF-DMR-0520404), and was performed in part at the Cornell High Energy Synchrotron Source, also supported by the NSF and NIH-NIGMS (Grant No. NSF-DMR-0225180). J.R.E. would like to also acknowledge supplementary support via NSF-ECS-0210693 and NSF-CTS-0529042. S.H. and A.A. would like to acknowledge the Korea Research Foundation (Grant No. KRF-2006-352-D00108) and the Natural Sciences and Engineering Council of Canada, respectively, for post-doctoral fellowships.",

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doi = "10.1063/1.3088835",

language = "English (US)",

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AU - Amassian, A.

AU - Desai, T. V.

AU - Kowarik, S.

AU - Hong, S.

AU - Woll, A. R.

AU - Malliaras, G. G.

AU - Schreiber, F.

AU - Engstrom, J. R.

N1 - Funding Information: This work was supported by the Cornell Center for Materials Research, a National Science Foundation MRSEC (Grant No. NSF-DMR-0520404), and was performed in part at the Cornell High Energy Synchrotron Source, also supported by the NSF and NIH-NIGMS (Grant No. NSF-DMR-0225180). J.R.E. would like to also acknowledge supplementary support via NSF-ECS-0210693 and NSF-CTS-0529042. S.H. and A.A. would like to acknowledge the Korea Research Foundation (Grant No. KRF-2006-352-D00108) and the Natural Sciences and Engineering Council of Canada, respectively, for post-doctoral fellowships.

PY - 2009

Y1 - 2009

N2 - We have examined the dynamics of adsorption of diindenoperylene (DIP) on SiO2 and SiO2 modified with an interfacial organic layer using in situ real time synchrotron x-ray scattering, focusing on the effects of coverage. On both surfaces we observe a substantial increase in the probability of adsorption with increasing coverage, which is most dramatic at the highest incident kinetic energies. On the initially uncovered surfaces, we observe a smooth decrease in the probability of adsorption with increasing incident kinetic energy, indicative of trapping-mediated adsorption. Once both surfaces are covered by DIP, the effects of incident kinetic energy are greatly reduced, and trapping is very efficient over the range of kinetic energies examined. Possible reasons for efficient trapping at high coverage and at high incident kinetic energy include more efficient momentum transfer due to mass matching, and possibly direct molecular insertion. Comparison to results on another small-molecule, pentacene, suggests that this behavior should be common to hyperthermal growth of a variety of other small-molecule thin films.

AB - We have examined the dynamics of adsorption of diindenoperylene (DIP) on SiO2 and SiO2 modified with an interfacial organic layer using in situ real time synchrotron x-ray scattering, focusing on the effects of coverage. On both surfaces we observe a substantial increase in the probability of adsorption with increasing coverage, which is most dramatic at the highest incident kinetic energies. On the initially uncovered surfaces, we observe a smooth decrease in the probability of adsorption with increasing incident kinetic energy, indicative of trapping-mediated adsorption. Once both surfaces are covered by DIP, the effects of incident kinetic energy are greatly reduced, and trapping is very efficient over the range of kinetic energies examined. Possible reasons for efficient trapping at high coverage and at high incident kinetic energy include more efficient momentum transfer due to mass matching, and possibly direct molecular insertion. Comparison to results on another small-molecule, pentacene, suggests that this behavior should be common to hyperthermal growth of a variety of other small-molecule thin films.

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Coverage dependent adsorption dynamics in hyperthermal organic thin film growth

Abstract

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