Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles

P. Iqbal, K. Critchley, S. Begum, D. Attwood, S. D. Evans, I. P. Jones, J. A. Preece

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Novel self-assembled monolayers of 3,4-disubstituted thiophenes (3,4-dioctylthiophene and 3,4-diheptyloxythiophene) were prepared and characterized by contact angle measurements, ellipsometry and X-ray photoelectron spectroscopy. In addition, Au nanoparticles passivated with the 3,4-disubstituted thiophenes (3,4-dioctylthiophene and 3,4-diheptyloxythiophene) and monosubstituted thiophene (3-octylthiophene) were synthesized and characterized by UV/visible spectroscopy, transmission electron microscopy and dynamic light scattering. The Au nanoparticles had diameters in the range 5–7 nm. The Au nanoparticles stabilized with the thiophene derivatives were, as expected, less stable than the Au nanoparticles passivated with decanethiol and didecylsulfide. Surprisingly, the particles passivated with the monosubstituted 3-octylthiophene were more stable than the 3,4-dioctyl and 3,4-diheptyloxythiophene passivated particles. Such lower stability Au nanoparticles may find uses as negative tone resists in the formation of nanowires by e-beam lithography, via the more readily cleavable Au–S bond
Original languageEnglish
Pages (from-to)143-164
Number of pages22
JournalJournal of Experimental Nanoscience
Volume1
Issue number2
DOIs
Publication statusPublished - 2006

Fingerprint

Thiophenes
Thiophene
Passivation
Nanoparticles
Ellipsometry
Self assembled monolayers
Dynamic light scattering
Angle measurement
Lithography
Nanowires
Contact angle
X ray photoelectron spectroscopy
Spectroscopy
Transmission electron microscopy
Derivatives

Keywords

  • Au nanoparticles
  • SAMs
  • TEM
  • Thiophene
  • XPS

Cite this

Iqbal, P., Critchley, K., Begum, S., Attwood, D., Evans, S. D., Jones, I. P., & Preece, J. A. (2006). Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles. Journal of Experimental Nanoscience, 1(2), 143-164. https://doi.org/10.1080/17458080500504058

Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles. / Iqbal, P.; Critchley, K.; Begum, S.; Attwood, D.; Evans, S. D.; Jones, I. P.; Preece, J. A.

In: Journal of Experimental Nanoscience, Vol. 1, No. 2, 2006, p. 143-164.

Research output: Contribution to journalArticle

Iqbal, P, Critchley, K, Begum, S, Attwood, D, Evans, SD, Jones, IP & Preece, JA 2006, 'Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles' Journal of Experimental Nanoscience, vol. 1, no. 2, pp. 143-164. https://doi.org/10.1080/17458080500504058
Iqbal, P. ; Critchley, K. ; Begum, S. ; Attwood, D. ; Evans, S. D. ; Jones, I. P. ; Preece, J. A. / Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles. In: Journal of Experimental Nanoscience. 2006 ; Vol. 1, No. 2. pp. 143-164.
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