| Title |
Nanotwinning and structural phase transition in CdS quantum dots
|
|---|---|
| Published in |
Discover Nano, October 2012
|
| DOI | 10.1186/1556-276x-7-584 |
| Pubmed ID | |
| Authors |
Pragati Kumar, Nupur Saxena, Ramesh Chandra, Vinay Gupta, Avinash Agarwal, Dinakar Kanjilal |
| Abstract |
Nanotwin structures are observed in high-resolution transmission electron microscopy studies of cubic phase CdS quantum dots in powder form by chemical co-precipitation method. The deposition of thin films of nanocrystalline CdS is carried out on silicon, glass, and TEM grids keeping the substrates at room temperature (RT) and 200°C by pulsed laser ablation. These films are then subjected to thermal annealing at different temperatures. Glancing angle X-ray diffraction results confirm structural phase transitions after thermal annealing of films deposited at RT and 200°C. The variation of average particle size and ratio of intensities in Raman peaks I2LO/I1LO with annealing temperature are studied. It is found that electron-phonon interaction is a function of temperature and particle size and is independent of the structure. Besides Raman modes LO, 2LO and 3LO of CdS at approximately 302, 603, and 903 cm-1 respectively, two extra Raman modes at approximately 390 and 690 cm-1 are studied for the first time. The green and orange emissions observed in photoluminescence are correlated with phase transition. |
Mendeley readers
The data shown below were compiled from readership statistics for 93 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| India | 1 | 1% |
| Unknown | 92 | 99% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 36 | 39% |
| Researcher | 11 | 12% |
| Student > Doctoral Student | 8 | 9% |
| Professor > Associate Professor | 4 | 4% |
| Student > Bachelor | 3 | 3% |
| Other | 14 | 15% |
| Unknown | 17 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Materials Science | 25 | 27% |
| Physics and Astronomy | 14 | 15% |
| Chemistry | 14 | 15% |
| Chemical Engineering | 4 | 4% |
| Engineering | 2 | 2% |
| Other | 4 | 4% |
| Unknown | 30 | 32% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 23 October 2012.
All research outputs
#22,758,309
of 25,373,627 outputs
Outputs from Discover Nano
#798
of 1,146 outputs
Outputs of similar age
#181,499
of 202,127 outputs
Outputs of similar age from Discover Nano
#11
of 83 outputs
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So far Altmetric has tracked 1,146 research outputs from this source. They receive a mean Attention Score of 3.5. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
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We're also able to compare this research output to 83 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.