Vapor deposition of polystyrene thin films by intense laser vibrational excitation

TY - JOUR

T1 - Vapor deposition of polystyrene thin films by intense laser vibrational excitation

AU - Papantonakis, M. R.

AU - Horwitz, J. S.

AU - Haglund, R. F.

AU - Toftmann, B.

AU - McGill, R. A.

AU - Chrisey, D. B.

N1 - Funding Information: Research at Vanderbilt University was partially supported by the US Department of Energy, Office of Science through the Environmental Management Science Program (Contract No. DE-FG07-98ER62710). We thank the staff of the W.M. Keck Foundation Free-Electron Laser Center for expert operation of the light source, which is supported in part by the Office of Naval Research through the Medical Free Electron Laser Program (Contract No. N00014-1-94-1023). One of the authors D.M.B. would like to thank J.M. Joseph for useful discussions and the ASEE/NRL fellows program for assistance. At the NRL, this work was supported in part by the Office of Naval Research.

PY - 2002/1/30

Y1 - 2002/1/30

N2 - Polystyrene films were deposited using resonant infrared pulsed laser depositions (RIR-PLD). Thin films were grown on Si(111) wafers and NaCl substrates and analyzed by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The depositions were carried out in vacuum (10-4-10-5 Torr) at wavelengths 3.28, 3.30, 3.42 and 3.48 μm which are resonant with CH2 stretching modes in the polymer. We also attempted to deposit a films using non-resonant infrared (RIR) excitation (2.90 μm). At this wavelength no films were deposited, and evidence for laser-induced damage to the target can be seen. RIR-PLD is a fundamentally new approach to polymer thin film growth as the absorption of radiation resonant with vibrational modes allow the energy to be deposited into the polymer and transfers between macromolecules in such a way as to promote efficient, non-destructive desorption into the gas phase.

AB - Polystyrene films were deposited using resonant infrared pulsed laser depositions (RIR-PLD). Thin films were grown on Si(111) wafers and NaCl substrates and analyzed by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The depositions were carried out in vacuum (10-4-10-5 Torr) at wavelengths 3.28, 3.30, 3.42 and 3.48 μm which are resonant with CH2 stretching modes in the polymer. We also attempted to deposit a films using non-resonant infrared (RIR) excitation (2.90 μm). At this wavelength no films were deposited, and evidence for laser-induced damage to the target can be seen. RIR-PLD is a fundamentally new approach to polymer thin film growth as the absorption of radiation resonant with vibrational modes allow the energy to be deposited into the polymer and transfers between macromolecules in such a way as to promote efficient, non-destructive desorption into the gas phase.

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U2 - https://doi.org/10.1016/S0009-2614(01)01423-3

DO - https://doi.org/10.1016/S0009-2614(01)01423-3

M3 - Article

SN - 0009-2614

VL - 352

SP - 135

EP - 139

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -