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Volumn 16, Issue 43, 2006, Pages 4197-4205

Formation of periodic stripe patterns in nematic liquid crystals doped with functionalized gold nanoparticles

Author keywords

[No Author keywords available]

Indexed keywords

AGGLOMERATION; DOPING (ADDITIVES); GOLD COMPOUNDS; NANOSTRUCTURED MATERIALS; OPTICAL MICROSCOPY; POLARIZATION; SCATTERING;

EID: 33750479340     PISSN: 09599428     EISSN: 13645501     Source Type: Journal    
DOI: 10.1039/b611501b     Document Type: Article
Times cited : (185)

References (52)
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    • In contrast to the work of Whetten and Schaaf 27 and Kimura et al., 30 Au1-Au4 are not monodisperse. Therefore, the CD measured represents the average over all particle sizes in the sample. The weak CD, attributed to artifacts, measured for Au1 and Au2, however, are reproducibly positive for different preparations (prepared on different days with the same set of starting materials). For example, the CD spectra of Au1 and the CD spectra of the concentration dependence were measured for different preparations of Au1 (see Fig. S2 and S3 in ESI). We are currently trying to determine the nature of these artifacts, and the contributions from multiple scattering of particle aggregates in solutions. Time-dependent dynamic light scattering (DLS) measurements show that all particles, Au1-Au4, aggregate in solution as indicated by a significant increase in the size of the particle aggregates over the time frame of the CD measurements
    • H. Yao K. Miki N. Nishida A. Sasaki K. Kimura J. Am. Chem. Soc. 2005 127 15536
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  • 38
    • 85022925832 scopus 로고
    • Theory of absorption and circular dichroism of large inhomogeneous molecular aggregates, in
    • B. Samori and E. W. Thulstrup, Nato ASI Series C: Mathematical and Physical Sciences, pp. 357-380
    • C. Bustamante, D. Keller and M. Kim, Theory of absorption and circular dichroism of large inhomogeneous molecular aggregates, in Polarized spectroscopy of ordered systems, ed., B. Samori and E. W. Thulstrup, Nato ASI Series C: Mathematical and Physical Sciences, 1987, 242, pp. 357-380
    • (1987) Polarized Spectroscopy of Ordered Systems, Ed. , vol.242
    • Bustamante, C.1    Keller, D.2    Kim, M.3
  • 39
    • 0038164629 scopus 로고
    • The effect of anisotropic properties of randomly oriented particles on polarized light: An operational calculus for spatially heterogeneous distributions, in
    • B. Samori and E. W. Thulstrup, Nato ASI Series C: Mathematical and Physical Sciences, pp. 381-390
    • M. F. Maestre, The effect of anisotropic properties of randomly oriented particles on polarized light: An operational calculus for spatially heterogeneous distributions, in Polarized spectroscopy of ordered systems, ed., B. Samori and E. W. Thulstrup, Nato ASI Series C: Mathematical and Physical Sciences, 1987, 242, pp. 381-390
    • (1987) Polarized Spectroscopy of Ordered Systems, Ed. , vol.242
    • Maestre, M.F.1
  • 40
    • 0020770309 scopus 로고
    • These interactions would also facilitate aggregation of particles in solution. Contributions from circular differential scattering due to the formation of cluster aggregates were not discussed in previous experimental reports 27,29,30 on chiral gold nanoparticles For an example, see:
    • C. Bustamante I. Tinoco, Jr. M. F. Maestre Proc. Natl. Acad. Sci. U. S. A. 1983 80 3568
    • (1983) Proc. Natl. Acad. Sci. U. S. A. , vol.80 , pp. 3568
    • Bustamante, C.1    Tinoco Jr., I.2    Maestre, M.F.3
  • 48
    • 27144549231 scopus 로고    scopus 로고
    • Further electro-optical investigations will be reported in due course Alkylthiols used in self-assembled monolayers (SAMs) are known to promote homeotropic anchoring of N-LCs such as 5CB (here LC2):
    • K. Akagi S. Guo T. Mori M. Goh G. Piao M. Kyotani J. Am. Chem. Soc. 2005 127 14647
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 14647
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  • 49
    • 0029640414 scopus 로고
    • The sharp boundaries between birefringent and homeotropic areas appear similar to textures shown for patterned surfaces reported by Clark and Lee - a result of chiral symmetry breaking at the interface between parallel and homeotropically aligned domains in the absence of a chiral phase. See:
    • R. A. Drawhorn N. L. Abbott J. Phys. Chem. 1995 99 16511
    • (1995) J. Phys. Chem. , vol.99 , pp. 16511
    • Drawhorn, R.A.1    Abbott, N.L.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.