Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties
A new molecular architecture consist of the liquid crystals decorated gold nanoparticles having azobenzenes moieties as the peripheral units connected to gold nanoparticles (Au NPs) via alkyl groups were synthesized and characterized. The mesomorphic properties were investigated by differential sca...
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| Format: | Article |
| Language: | English |
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American Scientific Publishers
2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/1/shaheen-fist-2017.pdf |
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eprints |
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ump-194722018-06-28T06:59:06Z http://umpir.ump.edu.my/id/eprint/19472/ Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties Biswas, Tapan Kumar Yuvaraj, A. R. Sarkar, Shaheen M. Muhammad Nor Fazli, Abd Malek M. M., Yusoff Arsad, Sazmal E. Lutfor, M. R. QD Chemistry A new molecular architecture consist of the liquid crystals decorated gold nanoparticles having azobenzenes moieties as the peripheral units connected to gold nanoparticles (Au NPs) via alkyl groups were synthesized and characterized. The mesomorphic properties were investigated by differential scanning calorimetry, polarizing optical microscopy, field emission scanning electron microscope and high-resolution transmission electron microscopy. The thiolated ligand molecules (3a-c) showed smectic A phase, whereas gold nanoparticles (5a-c) exhibit nematic phase. TEM measurement showed that the functionalized Au NPs are well dispersed without any aggregation and size of the nanoparticles about 2 nm. The trans-form of azo compounds showed a strong band in the UV region at ∼378 nm for the �–�∗ transition, and a weak band in the visible region at ∼472 nm due to the n–�∗ transition. These molecules exhibit strong photoisomerization behaviour in which trans-cis take 18 second for compound 5c, whereas cis-trans take place about 45 min. Thus, the photoswitching behaviour of these materials may be suitably exploited in the field of molecular switches and optical storage devices. American Scientific Publishers 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19472/1/shaheen-fist-2017.pdf Biswas, Tapan Kumar and Yuvaraj, A. R. and Sarkar, Shaheen M. and Muhammad Nor Fazli, Abd Malek and M. M., Yusoff and Arsad, Sazmal E. and Lutfor, M. R. (2017) Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties. Nanoscience and Nanotechnology Letters, 9 (2). pp. 100-108. ISSN 1941-4900 https://doi.org/10.1166/nnl.2017.2254 doi:10.1166/nnl.2017.2254 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Malaysia Pahang |
| building |
UMP Institutional Repository |
| collection |
Online Access |
| language |
English |
| topic |
QD Chemistry |
| spellingShingle |
QD Chemistry Biswas, Tapan Kumar Yuvaraj, A. R. Sarkar, Shaheen M. Muhammad Nor Fazli, Abd Malek M. M., Yusoff Arsad, Sazmal E. Lutfor, M. R. Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| description |
A new molecular architecture consist of the liquid crystals decorated gold nanoparticles having azobenzenes moieties as the peripheral units connected to gold nanoparticles (Au NPs) via alkyl groups were synthesized and characterized. The mesomorphic properties were investigated by differential
scanning calorimetry, polarizing optical microscopy, field emission scanning electron microscope and high-resolution transmission electron microscopy. The thiolated ligand molecules (3a-c) showed smectic A phase, whereas gold nanoparticles (5a-c) exhibit nematic phase. TEM measurement showed that the functionalized Au NPs are well dispersed without any aggregation and size of
the nanoparticles about 2 nm. The trans-form of azo compounds showed a strong band in the UV region at ∼378 nm for the �–�∗ transition, and a weak band in the visible region at ∼472 nm due to the n–�∗ transition. These molecules exhibit strong photoisomerization behaviour in which trans-cis take 18 second for compound 5c, whereas cis-trans take place about 45 min. Thus, the photoswitching behaviour of these materials may be suitably exploited in the field of molecular switches and optical storage devices. |
| format |
Article |
| author |
Biswas, Tapan Kumar Yuvaraj, A. R. Sarkar, Shaheen M. Muhammad Nor Fazli, Abd Malek M. M., Yusoff Arsad, Sazmal E. Lutfor, M. R. |
| author_facet |
Biswas, Tapan Kumar Yuvaraj, A. R. Sarkar, Shaheen M. Muhammad Nor Fazli, Abd Malek M. M., Yusoff Arsad, Sazmal E. Lutfor, M. R. |
| author_sort |
Biswas, Tapan Kumar |
| title |
Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| title_short |
Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| title_full |
Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| title_fullStr |
Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| title_full_unstemmed |
Synthesis and Characterization of New Liquid Crystals Embedded Gold Nanoparticles for Photoswitching Properties |
| title_sort |
synthesis and characterization of new liquid crystals embedded gold nanoparticles for photoswitching properties |
| publisher |
American Scientific Publishers |
| publishDate |
2017 |
| url |
http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/ http://umpir.ump.edu.my/id/eprint/19472/1/shaheen-fist-2017.pdf |
| first_indexed |
2023-09-18T22:27:48Z |
| last_indexed |
2023-09-18T22:27:48Z |
| _version_ |
1777416083132645376 |