In situ second harmonic generation measurements of the growth of nonlinear optical ionically self-assembled monolayers

C. Brands, P. J. Neyman, M. T. Guzy, S. Shah, Kevin Van Cott, R. M. Davis, H. Wang, H. W. Gibson, J. R. Heflin

Research output: Contribution to journalArticle

Abstract

Ionically self-assembled monolayers (ISAMs) have recently been shown to spontaneously exhibit a polar ordering that gives rise to a substantial second order nonlinear optical (NLO) response. Here, the deposition of ISAMs has been studied in situ via second harmonic generation (SHG). We show that the adsorption and ordering of a noncentrosymmetric nonlinear optical polymer is constant over a wide range of concentrations. Upon immersion in the NLO-active polyelectrolyte solution, the SHG rises sharply over the first minute. Immersion in the NLO-inactive partner polyelectrolyte leads to a reduction in the SHG signal. Furthermore, when the film is removed from the NLO-active solution and allowed to dry, the SHG increases rapidly as the water evaporates. These studies provide greater understanding of the processes by which noncentrosymmetric order is formed in ISAM films and allows design of improved self-assembled nonlinear optical materials.

Original languageEnglish (US)
Pages (from-to)JJ8.32.1-JJ8.32.6
JournalMaterials Research Society Symposium - Proceedings
Volume660
StatePublished - 2001
Externally publishedYes

Fingerprint

Self assembled monolayers
Harmonic generation
harmonic generations
Polyelectrolytes
submerging
Optical materials
optical materials
Polymers
Adsorption
adsorption
Water
polymers
water

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

In situ second harmonic generation measurements of the growth of nonlinear optical ionically self-assembled monolayers. / Brands, C.; Neyman, P. J.; Guzy, M. T.; Shah, S.; Van Cott, Kevin; Davis, R. M.; Wang, H.; Gibson, H. W.; Heflin, J. R.

In: Materials Research Society Symposium - Proceedings, Vol. 660, 2001, p. JJ8.32.1-JJ8.32.6.

Research output: Contribution to journalArticle

Brands, C, Neyman, PJ, Guzy, MT, Shah, S, Van Cott, K, Davis, RM, Wang, H, Gibson, HW & Heflin, JR 2001, 'In situ second harmonic generation measurements of the growth of nonlinear optical ionically self-assembled monolayers', Materials Research Society Symposium - Proceedings, vol. 660, pp. JJ8.32.1-JJ8.32.6.
Brands, C. ; Neyman, P. J. ; Guzy, M. T. ; Shah, S. ; Van Cott, Kevin ; Davis, R. M. ; Wang, H. ; Gibson, H. W. ; Heflin, J. R. / In situ second harmonic generation measurements of the growth of nonlinear optical ionically self-assembled monolayers. In: Materials Research Society Symposium - Proceedings. 2001 ; Vol. 660. pp. JJ8.32.1-JJ8.32.6.
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AU - Brands, C.

AU - Neyman, P. J.

AU - Guzy, M. T.

AU - Shah, S.

AU - Van Cott, Kevin

AU - Davis, R. M.

AU - Wang, H.

AU - Gibson, H. W.

AU - Heflin, J. R.

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AB - Ionically self-assembled monolayers (ISAMs) have recently been shown to spontaneously exhibit a polar ordering that gives rise to a substantial second order nonlinear optical (NLO) response. Here, the deposition of ISAMs has been studied in situ via second harmonic generation (SHG). We show that the adsorption and ordering of a noncentrosymmetric nonlinear optical polymer is constant over a wide range of concentrations. Upon immersion in the NLO-active polyelectrolyte solution, the SHG rises sharply over the first minute. Immersion in the NLO-inactive partner polyelectrolyte leads to a reduction in the SHG signal. Furthermore, when the film is removed from the NLO-active solution and allowed to dry, the SHG increases rapidly as the water evaporates. These studies provide greater understanding of the processes by which noncentrosymmetric order is formed in ISAM films and allows design of improved self-assembled nonlinear optical materials.

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