| Texto completo | |
| Autor(es): Mostrar menos - |
Puthirath, Anand B.
[1]
;
Oliveira, Eliezer F.
[2, 3]
;
Gao, Guanhui
[1]
;
Chakingal, Nithya
[1]
;
Kannan, Harikishan
[1]
;
Li, Chenxi
[1]
;
Zhang, Xiang
[1]
;
Biswas, Abhijit
[1]
;
Neupane, Mahesh R.
[4]
;
Pate, Bradford B.
[5]
;
Ruzmetov, Dmitry A.
[4]
;
Birdwell, A. Glen
[4]
;
Ivanov, Tony G.
[4]
;
Galvao, Douglas S.
[2, 3]
;
Vajtai, Robert
[1]
;
Ajayan, Pulickel M.
[1]
Número total de Autores: 16
|
| Afiliação do(s) autor(es): | [1] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA
[2] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys, Grp Organ Solids & New Mat, BR-13083970 Campinas, SP - Brazil
[3] Univ Campinas UNICAMP, Ctr Computat Engn & Sci CCES, BR-13083970 Campinas, SP - Brazil
[4] CCDC US Army Res Lab, RF & Digital Technol, Adelphi, MD 20783 - USA
[5] Naval Res Lab, Chem Div, Washington, DC 20375 - USA
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMISTRY OF MATERIALS; v. 33, n. 13, p. 4977-4987, JUL 13 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Oxygen bonded with diamond surfaces impacts important properties such as electrical conductivity, Schottky barrier height, field emission, and chemical reactivity. Though processes such as thermal, hydrogen plasma, etc., are efficient in oxidizing the hydrogen-terminated diamond surfaces, the oxidation of pristine diamond surfaces through wet chemical treatments is still in its infancy. Herein, we investigated the efficacy of Hummer's method, one of the most celebrated chemical oxidation procedures to convert graphite to graphene oxide, to oxidize the pristine diamond surfaces. We attempted to oxidize both microcrystalline diamond powders and polycrystalline diamond wafers. Due to the presence of an acidic oxidative environment and the formation of strong oxidizing agents such as Mn2O7 and MnO3+ during the course of the reaction, Hummer's method is found to be very effective in oxidizing the pristine diamond surfaces. The degree of oxygen termination is validated through various spectroscopic and surface probe measurements. Microcrystalline diamond powder is more prone to oxidation to polycrystalline diamond wafers due to excess surface area, and many facets with different dangling bond densities are exposed to the oxidizing medium. The experimental observations are endorsed through molecular dynamics simulations. (AU) | |
| Processo FAPESP: | 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 19/07157-9 - Projetando novas estruturas 3d a partir de modelos de zeólitas para aplicações em impressão 3d |
| Beneficiário: | Eliezer Fernando de Oliveira |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono |
| Beneficiário: | Eliezer Fernando de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |