Peculiarities of Crystallization of Amorphous Silver at 77 K in Conditions of Laser Herschel Effect
| Authors | Oleksandr B. Piven1, Oleh B. Piven1, Yuriy M. Lopatkin2 |
| Affiliations |
1 Cherkasy State Technological University, 460, Shevchenko Ave, 18006 Cherkasy, Ukraine 2 Sumy State University, 2, Rimsky-Korsakov St., 40007 Sumy, Ukraine |
| Е-mail | |
| Issue | Volume 11, Year 2019, Number 3 |
| Dates | Received 05 February 2019; revised manuscript received June 2019; published online 25 June 2019 |
| Citation | Oleksandr B. Piven, Oleh B. Piven, Yuriy M. Lopatkin, J. Nano- Electron. Phys. 11 No 3, 03023 (2019) |
| DOI | https://doi.org/10.21272/jnep.11(3).03023 |
| PACS Number(s) | 61.46. + w, 61.50.f, 61.80.Ba, 72.50. + b |
| Keywords | Crystallization (4) , Normal Herschel laser effect, Positive Herschel laser effect, Latent image centers, Coagulation centers, Laser light, Transmission electron microscopy (2) , Low temperature (3) . |
| Annotation |
The synthesis of new nanomaterials with designed functionalities have rapidly growing importance and many applications including energy conversion and storage, electronics, photonics, plasmonics, catalysis and biomedical engineering. This synthesis demands studying the nucleation and growth mechanisms of nanoparticles including new achievements in molecular chemistry, nanochemistry, physics of amorphous solids and solid state physics. In this work, we experimentally investigated the crystallization of amorphous silver clots at a temperature of 77 K on the surface of emulsion AgBr microcrystals extracted from the photo-layer SP-1 with a sensitivity of 6 units under the action of infrared laser radiation using a transmission electron microscope BS-613 Tesla with a resolution not worse than 4.5 Å. To obtain electron microscopic photographs, the method of collodion replicas was used. Replicas from emulsion AgBr microcrystals were not shaded by coal but were cooled with liquid nitrogen before and during photographing in an electron microscope. It is shown that an increase in the laser power and the amount of absorbed laser energy at 77 K leads to the formation of latent image centers. When the emulsion AgBr microcrystals were exposed for 300 s at 77 K by laser radiation with a wavelength of 633 nm and a power of P1 2.5 mW, the coagulation centers were formed and the normal Herschel laser effect was observed. But under the same conditions and power of P2 10 mW and at 77 K, the latent image centers were formed and the positive Herschel laser effect was observed. |
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List of References |
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