Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Michael Pravica"'
Autor:
Princess Canasa, David King, Petrika Cifligu, Adrian F. Lua Sanchez, Si L. Chen, Haesook Han, Trimaan Malik, Brant Billinghurst, Jianbao Zhao, Changyong Park, George R. Rossman, Michael Pravica, Pradip K. Bhowmik, Egor Evlyukhin
Publikováno v:
Small Science, Vol 4, Iss 8, Pp n/a-n/a (2024)
In advanced photonics, there is a growing interest in piezochromic luminescent materials that exhibit multicolor switching, driven by their potential applications in optical recording, memory, and sensors. Here, the piezochromic behavior of 2,4,6‐t
Externí odkaz:
https://doaj.org/article/65b32e17ff4641e38a7347ddfe5e9c78
Autor:
Adrian F. Lua Sanchez, Petrika Cifligu, Marc Graff, Michael Pravica, Pradip K. Bhowmik, Changyong Park, Egor Evlyukhin
Publikováno v:
AIP Advances, Vol 13, Iss 10, Pp 105031-105031-8 (2023)
The high proclivity of x rays to destabilize and distort molecular structures has been previously utilized in the synthesis of novel compounds. Here, we show that x-ray induced decomposition of cadmium oxalate induces chemical and structural transfor
Externí odkaz:
https://doaj.org/article/a034d7af1f924ab3b30ab0e97fcfaf36
Autor:
Yonggang Wang, Jinlong Zhu, Wenge Yang, Ting Wen, Michael Pravica, Zhenxian Liu, Mingqiang Hou, Yingwei Fei, Lei Kang, Zheshuai Lin, Changqing Jin, Yusheng Zhao
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
Pressure can either make materials more disordered, like amorphization, or more thermodynamic stable, yet the switching between the two metastable phases has not been described. Wang et al. study it in vanadium oxide nanosheets and highlight the role
Externí odkaz:
https://doaj.org/article/adf4940c33ef4c5d903aee22b2cb621c
Autor:
Egor Evlyukhin, Petrika Cifligu, Michael Pravica, Pradip K. Bhowmik, Eunja Kim, Dmitry Popov, Changyong Park
Publikováno v:
Physical Chemistry Chemical Physics. 25:1799-1807
Absorption of sufficiently energetic X-ray photons by a molecular system results in a cascade of ultrafast electronic relaxation processes which leads to a distortion and dissociation of its molecular structure. Here, we demonstrate that only decompo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61b903c276c2f1a7ce2af9f9a2660a78
https://doi.org/10.1039/d2cp04767e
https://doi.org/10.1039/d2cp04767e
Publikováno v:
High Pressure Research. 41:52-64
We report theoretical and experimental investigations on the structures of strontium and magnesium oxalates, and corresponding Raman spectra at high pressure. These systems have shown progress in the generation of CO2 and in the synthesis of energeti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edd0168164f50cf59fff06914a7b87d7
https://doi.org/10.1080/08957959.2021.1891229
https://doi.org/10.1080/08957959.2021.1891229
Autor:
Roman Chernikov, Cheyenne McGlothen, Michael Pravica, Kevin Ayala-Pineda, Petrika Cifligu, Jianbao Zhao
Publikováno v:
Physical Chemistry Chemical Physics. 23:5969-5974
We examined the high pressure behavior of stannous oxalate via Raman and X-ray absorption spectroscopy (XAS) inside a diamond anvil cell. Phase transitions were observed to occur near 2.6 and 15 GPa which were reversible upon decompression to ambient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::972258b9001c141a24669eaa653cad70
https://doi.org/10.1039/d1cp00306b
https://doi.org/10.1039/d1cp00306b
Publikováno v:
Chemical Physics Letters. 724:35-41
The pressure-induced cubic → orthorhombic transition occurring in HgF2 was investigated via X-ray diffraction and density functional theory. The predicted, ambient cubic (Fm-3m) fluorite structure of HgF2, can be obtained using a high-pressure ramp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8337e7e4027979c3a16dce0a06fddc58
https://doi.org/10.1016/j.cplett.2019.03.045
https://doi.org/10.1016/j.cplett.2019.03.045
Autor:
Michael, Pravica, Roman, Chernikov, Kevin, Ayala-Pineda, Jianbao, Zhao, Petrika, Cifligu, Cheyenne, McGlothen
Publikováno v:
Physical chemistry chemical physics : PCCP. 23(10)
We examined the high pressure behavior of stannous oxalate via Raman and X-ray absorption spectroscopy (XAS) inside a diamond anvil cell. Phase transitions were observed to occur near 2.6 and 15 GPa which were reversible upon decompression to ambient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c56180dbae7c505ce294af8353ecb408
https://pubmed.ncbi.nlm.nih.gov/33666623
https://pubmed.ncbi.nlm.nih.gov/33666623
Autor:
Egor Evlyukhin, Blake Harris, Eunja Kim, Michael Pravica, Sarah Schyck, George R. Rossman, David Goldberger, Sindi Torres, Petrika Cifligu
Publikováno v:
Journal of Materials Chemistry C. 6:12473-12478
The synthesis and characterization of a novel, low cost, amorphous wide-bandgap semiconductor via X-ray induced decomposition of strontium oxalate at high pressure have been demonstrated. By means of IR spectroscopy, the final product is identified a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aeee9acc001aec545858a5fc03d48b19
https://doi.org/10.1039/c8tc04496a
https://doi.org/10.1039/c8tc04496a
Autor:
Egor Evlyukhin, Ning Chen, Petrika Cifligu, Blake Harris, Michael Pravica, Yonggang Wang, Jung Jae Koh
Publikováno v:
Chemical Physics Letters. 686:183-188
We report a novel synthesis of stable doped solid carbon monoxide (p-CO) via hard X-ray irradiation of strontium oxalate at ambient conditions and high pressure. We also show via mid- and far- infrared (IR) techniques that CO2 produced via X-ray phot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7894490409f188f00ade8d4a3f2d3af
https://doi.org/10.1016/j.cplett.2017.08.053
https://doi.org/10.1016/j.cplett.2017.08.053