CRIANTE, Luigino; BRACALENTE, Francesco; LUCCHETTI, Liana; SIMONI, Francesco; BRASSELET, Etienne

doi:10.1039/C3SM50273B

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CRIANTE, Luigino
Consorzio Nazionale Interuniversitario per la Struttura della Materia [CNISM]
Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica
Center for Nano Science and Technology@PoliMi

BRACALENTE, Francesco
Consorzio Nazionale Interuniversitario per la Struttura della Materia [CNISM]
Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica

LUCCHETTI, Liana
Consorzio Nazionale Interuniversitario per la Struttura della Materia [CNISM]
Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica

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Soft Matter. 2013, vol. 9, n° 22, p. 5459-5463

Royal Society of Chemistry

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We report on the electrical tuning of the interaction range between colloidal particles in nematic liquid crystals. The experimental demonstration relies on the study of the dynamics of a real colloidal particle made of a glass sphere in the presence of an artificial laser-induced colloid that results from the local distortion of the nematic by a Gaussian light beam. The optoelastic interaction range between such a pair of colloids is shown to be fully controlled electrically. Moreover, all the observations are well described by an analytical model that accounts for the field-induced reorientation of the liquid crystal and the overlap between the long-range director distortion around both colloids.< Réduire

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Electrically tunable optoelastic interaction range of nematic colloids

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