Research output: Contribution to journal › Article › peer-review
Reversible long-range patterning of gold nanoparticles by smectic liquid crystals. / Milette, Jonathan; Relaix, Sabrina; Lavigne, Cyrille; Toader, Violeta; Cowling, Stephen J.; Saez, Isabel M.; Lennox, R. Bruce; Goodby, John W.; Reven, Linda.
In: Soft Matter, Vol. 8, No. 24, 28.06.2012, p. 6593-6598.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Reversible long-range patterning of gold nanoparticles by smectic liquid crystals
AU - Milette, Jonathan
AU - Relaix, Sabrina
AU - Lavigne, Cyrille
AU - Toader, Violeta
AU - Cowling, Stephen J.
AU - Saez, Isabel M.
AU - Lennox, R. Bruce
AU - Goodby, John W.
AU - Reven, Linda
PY - 2012/6/28
Y1 - 2012/6/28
N2 - 4.7 nm Gold nanoparticles(AuNPs) capped with mesogenic ligands, dispersed in homeotropically aligned smectic A liquid crystal (LC), reversibly form arrays of aggregates with micron-scale periodicities over macroscopic areas at the nematic to smectic A phase transition (TN-SmA). AuNPs with a mixed capping layer of 4'-(n-mercaptododecyloxy)biphenyl-4-carbonitrile and hexanethiol in a 1 : 1 ratio were dispersed in 4'-octyl-4-cyanobiphenyl (8CB) and subjected to boundary conditions known to produce periodic edge dislocations. In a cavity cell with a meniscus, the arrays consisted of concentric circles. Linear arrays were produced by wedge cells and control over the periodicity was achieved through variation of the wedge angle. Based on the dependence of the geometry and periodicity of the arrays on boundary conditions, we propose that the AuNPs concentrate at edge dislocation defects of the smectic phase.
AB - 4.7 nm Gold nanoparticles(AuNPs) capped with mesogenic ligands, dispersed in homeotropically aligned smectic A liquid crystal (LC), reversibly form arrays of aggregates with micron-scale periodicities over macroscopic areas at the nematic to smectic A phase transition (TN-SmA). AuNPs with a mixed capping layer of 4'-(n-mercaptododecyloxy)biphenyl-4-carbonitrile and hexanethiol in a 1 : 1 ratio were dispersed in 4'-octyl-4-cyanobiphenyl (8CB) and subjected to boundary conditions known to produce periodic edge dislocations. In a cavity cell with a meniscus, the arrays consisted of concentric circles. Linear arrays were produced by wedge cells and control over the periodicity was achieved through variation of the wedge angle. Based on the dependence of the geometry and periodicity of the arrays on boundary conditions, we propose that the AuNPs concentrate at edge dislocation defects of the smectic phase.
UR - http://www.scopus.com/inward/record.url?scp=84862292050&partnerID=8YFLogxK
U2 - 10.1039/c2sm25445j
DO - 10.1039/c2sm25445j
M3 - Article
VL - 8
SP - 6593
EP - 6598
JO - Soft Matter
JF - Soft Matter
SN - 1744-683X
IS - 24
ER -