| 000 | 04048nlm1a2200397 4500 | ||
|---|---|---|---|
| 001 | 662549 | ||
| 005 | 20231030041825.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\33704 | ||
| 035 | _aRU\TPU\network\33690 | ||
| 090 | _a662549 | ||
| 100 | _a20200902a2020 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aUS | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aPatterning GaSe by High-Powered Laser Beams _fD. L. Cheshev, R. D. Rodriguez (Rodriges) Contreras, A. Matkovic [et al.] |
|
| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 330 | _aWe report the high-powered laser modification of the chemical, physical, and structural properties of the two-dimensional (2D) van der Waals material GaSe. Our results show that contrary to expectations and previous reports, GaSe at the periphery of a high-power laser beam does not entirely decompose into Se and Ga2O3. In contrast, we find unexpectedly that the Raman signal from GaSe gets amplified around regions where it was not expected to exist. Atomic force microscopy (AFM), dielectric force microscopy (DFM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) results show that laser irradiation induces the formation of nanoparticles. Our analyses demonstrate that, except for a fraction of Ga2Se3, these nanoparticles still belong to the GaSe phase but possess different electrical and optical properties. These changes are evidenced in the increased Raman intensity attributed to the near-resonance conditions with the Raman excitation laser. The elemental analysis of nanoparticles shows that the relative selenium content increased to as much as 70% from a 50:50 value in stoichiometric GaSe. This elemental change is related to the formation of the Ga2Se3 phase identified by Raman spectroscopy at some locations near the edge. Further, we exploit the localized high-power laser processing of GaSe to induce the formation of Ag–GaSe nanostructures by exposure to a solution of AgNO3. The selective reaction of AgNO3 with laser-irradiated GaSe gives rise to composite nanostructures that display photocatalytic activity originally absent in the pristine 2D material. The photocatalytic activity was investigated by the transformation of 4-nitrobenzenethiol to its amino and dimer forms detected in situ by Raman spectroscopy. This work improves the understanding of light–matter interaction in layered systems, offering an approach to the formation of laser-induced composites with added functionality. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 | _tACS Omega | ||
| 463 |
_tVol. 5, iss. 17 _v[P. 10183–10190] _d2020 |
||
| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 701 | 1 |
_aCheshev _bD. L. _cSpecialist in the field of material science _cEngineer of Tomsk Polytechnic University _f2000- _gDmitry Leonidovich _2stltpush _3(RuTPU)RU\TPU\pers\47385 |
|
| 701 | 1 |
_aRodriguez (Rodriges) Contreras _bR. D. _cVenezuelan physicist, doctor of science _cProfessor of Tomsk Polytechnic University _f1982- _gRaul David _2stltpush _3(RuTPU)RU\TPU\pers\39942 |
|
| 701 | 1 |
_aMatkovic _bA. _gAleksandar |
|
| 701 | 1 |
_aRuban _bA. S. _cgeologist _cengineer of Tomsk Polytechnic University _f1991- _gAleksey Sergeevich _2stltpush _3(RuTPU)RU\TPU\pers\34023 |
|
| 701 | 0 | _aChen Jin-Ju | |
| 701 | 1 |
_aSheremet _bE. S. _cphysicist _cProfessor of Tomsk Polytechnic University _f1988- _gEvgeniya Sergeevna _2stltpush _3(RuTPU)RU\TPU\pers\40027 |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИсследовательская школа химических и биомедицинских технологий _c(2017- ) _h8120 _2stltpush _3(RuTPU)RU\TPU\col\23537 |
| 801 | 2 |
_aRU _b63413507 _c20221129 _gRCR |
|
| 856 | 4 | _uhttp://earchive.tpu.ru/handle/11683/64864 | |
| 856 | 4 | _uhttps://doi.org/10.1021/acsomega.0c01079 | |
| 942 | _cCF | ||