Synthesis of new liquid crystals embedded gold nanoparticles for photoswitching properties

Rahman, Md Lutfor; Biswas, Tapan Kumar; Sarkar, Shaheen M; Yusoff, Mashitah Mohd; Yuvaraj, A.R.; Kumar, Sandeep

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6602

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DC Field	Value	Language
dc.contributor.author	Rahman, Md Lutfor	-
dc.contributor.author	Biswas, Tapan Kumar	-
dc.contributor.author	Sarkar, Shaheen M	-
dc.contributor.author	Yusoff, Mashitah Mohd	-
dc.contributor.author	Yuvaraj, A.R.	-
dc.contributor.author	Kumar, Sandeep	-
dc.date.accessioned	2017-01-24T06:33:27Z	-
dc.date.available	2017-01-24T06:33:27Z	-
dc.date.issued	2016-09-15	-
dc.identifier.citation	Journal of Colloid and Interface Science, 2016, Vol.478, p384	en_US
dc.identifier.issn	0021-9797	-
dc.identifier.uri	http://hdl.handle.net/2289/6602	-
dc.description	Restricted Access.	en_US
dc.description.abstract	A new series of liquid crystals decorated gold nanoparticles is synthesized whose molecular architecture has azobenzenes moieties as the peripheral units connected to gold nanoparticles (Au NPs) via alkyl groups. The morphology and mesomorphic properties were investigated by field emission scanning electron microscope, high-resolution transmission electron microscopy, differential scanning calorimetry and polarizing optical microscopy. The thiolated ligand molecules (3a–c) showed enantiotropic smectic A phase, whereas gold nanoparticles (5a–c) exhibit nematic and smectic A phase with monotropic nature. HR-TEM measurement showed that the functionalized Au NPs are of the average size of 2 nm and they are well dispersed without any aggregation. The trans-form of azo compounds showed a strong band in the UV region at ∼378 nm for the π-π∗ transition, and a weak band in the visible region at ∼472 nm due to the n-π∗ transition. These molecules exhibit attractive photoisomerization behaviour in which trans-cis transition takes about 15 s whereas the cis-trans transition requires about 45 min for compound 5c. The extent of reversible isomerization did not decay after 10 cycles, which proved that the photo-responsive properties of 5c were stable and repeatable. Therefore, these materials may be suitably exploited in the field of molecular switches and the optical storage devices.	en_US
dc.language.iso	en	en_US
dc.publisher	Elsevier Inc.	en_US
dc.relation.uri	http://dx.doi.org/10.1016/j.jcis.2016.06.039	en_US
dc.rights	2016 Elsevier Inc	en_US
dc.title	Synthesis of new liquid crystals embedded gold nanoparticles for photoswitching properties	en_US
dc.type	Article	en_US
Appears in Collections:	Research Papers (SCM)

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