Post by williamplayer on Jan 7, 2014 13:59:23 GMT
Optical Manipulation of Self-Aligned Graphene Flakes in Liquid Crystals
Abstract:
Graphene recently emerged as a new two-dimensional material platform with unique optical, thermal and electronic properties. Single- or few-atom-thick graphene flakes can potentially be utilized to form structured bulk composites that further enrich these properties and enable a broad range of new applications. Here we describe optical manipulation of self-aligned colloidal graphene flakes in thermotropic liquid crystals of nematic and cholesteric types. Three-dimensional rotational and translational manipulation of graphene flakes by means of holographic optical tweezers allows for non-cont
act spatial patterning of graphene, control of liquid crystal defects, and low-power optical realignment of the liquid crystal director using these flakes. Potential applications include optically- and electrically-controlled reconfigurable liquid crystalline dispersions of spontaneously aligning colloidal graphene flakes and new
electro-optic devices with graphene -based interconnected transparent electrodes at surfaces and in the bulk of liquid crystals.
Read Full Article: www.opticsinfobase.org/view_article.cfm?gotourl=http%3A%2F%2Fwww.opticsinfobase.org%2FDirectPDFAccess%2F41EB1F32-CB92-63D3-5FA2392B8E1B38E4_248420%2Foe-21-1-1324.pdf%3Fda%3D1%26id%3D248420%26seq%3D0%26mobile%3Dno&org=
Abstract:
Graphene recently emerged as a new two-dimensional material platform with unique optical, thermal and electronic properties. Single- or few-atom-thick graphene flakes can potentially be utilized to form structured bulk composites that further enrich these properties and enable a broad range of new applications. Here we describe optical manipulation of self-aligned colloidal graphene flakes in thermotropic liquid crystals of nematic and cholesteric types. Three-dimensional rotational and translational manipulation of graphene flakes by means of holographic optical tweezers allows for non-cont
act spatial patterning of graphene, control of liquid crystal defects, and low-power optical realignment of the liquid crystal director using these flakes. Potential applications include optically- and electrically-controlled reconfigurable liquid crystalline dispersions of spontaneously aligning colloidal graphene flakes and new
electro-optic devices with graphene -based interconnected transparent electrodes at surfaces and in the bulk of liquid crystals.
Read Full Article: www.opticsinfobase.org/view_article.cfm?gotourl=http%3A%2F%2Fwww.opticsinfobase.org%2FDirectPDFAccess%2F41EB1F32-CB92-63D3-5FA2392B8E1B38E4_248420%2Foe-21-1-1324.pdf%3Fda%3D1%26id%3D248420%26seq%3D0%26mobile%3Dno&org=