First principles study of structural, electronic and vibrational properties of heavily boron-doped diamond

Niu, Li; Zhu, Jiaqi; Xiao, Han; Tan, Mingyi; Gao, Wei; Du, Shiyu

doi:10.1016/j.physleta.2009.05.008

Cited by 36 publications

(31 citation statements)

References 29 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The band position was found to agree well with the maxima in the phonon density of states of the diamond and could be related to a relaxation of the wave vector selection rules 42 . Theoretical analysis of the Raman scattering in heavily doped diamond C 64-n B n showed that the 500 cm -1 and 1230 cm -1 bands were both superposed bands that include not only C vibrations but also B-B vibrations and B-C vibrations, respectively 43 . The Raman peak at 1188 cm -1 has a particular shape ( Fig.…”

Section: B Synthesis Of the Cubic Bc 3 Phasementioning

confidence: 99%

See 1 more Smart Citation

Phase transition in BCx system under high-pressure and high-temperature: Synthesis of cubic dense BC3 nanostructured phase

Zinin

Ming

Ishii

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

Abstract. We synthesized a cubic BC 3 (c-BC 3 ) phase, by direct transformation from graphitic phases at a pressure of 39 GPa and temperature of 2200 K in a laser-heated diamond anvil cell (DAC). A combination of x-ray diffraction (XRD), electron diffraction (ED), transmission electron microscopy (TEM) imaging, and electron energy loss spectroscopy (EELS) measurements lead us to conclude that the obtained phase is hetero-nano-diamond, c-BC 3 . Highresolution TEM (HRTEM) imaging of the c-BC 3 specimen recovered at ambient conditions demonstrates that the c-BC 3 is a single, uniform, nanocrystalline phase with a grain size of about 3-5 nm. The EELS measurements show that the atoms inside the cubic structure are bonded by sp 3 bonds. The zero-pressure lattice parameter of the c-BC 3 calculated from diffraction peaks was found to be a = 3.589 ± 0.007 Å. The composition of the c-BC 3 is determined from EELS measurements. The ratio of carbon to boron, C/B, is approximately 3 (2.8 ± 0.7).2

show abstract

Section: B Synthesis Of the Cubic Bc 3 Phasementioning

confidence: 99%

“…We mentioned that Raman peaks of the c-BC 3 phase are broad (see also Ref. 43 ) and cannot be used for unique identification of the phase, however, Raman scattering measurements are a good indicator of the phase transition under high pressure.…”

Section: B Synthesis Of the Cubic Bc 3 Phasementioning

confidence: 99%

Phase transition in BCx system under high-pressure and high-temperature: Synthesis of cubic dense BC3 nanostructured phase

Zinin

Ming

Ishii

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Seguindo-se esta discussão, o pico de banda em 1230 cm -1 deve representar a combinação de picos de fônons ópticos causados pela incorporação do boro no diamante. Corroborando com os resultados de May et al (12) , Niu et al (13) discutiram as vibrações eletrônicas associadas às propriedades de filmes de diamante altamente dopados e concluíram que as bandas em 500 e 1230 cm -1 podem ser ambas originárias não somente das vibrações em ligações C-C com defeitos induzidos, mas também por vibrações do tipo B-B e B-C, respectivamente. A presença de uma banda em torno de 1580 cm -1 é atribuída ao carbono com ligações do tipo sp 2 , ou seja, do tipo grafite, que não está evidenciada para ambos os filmes, mostrando a boa qualidade dos mesmos.…”

Section: Resultados E Discussõesunclassified

Estudo da fotoeletrodeposição de partículas de cobre sobre filmes de diamante dopado com boro

Ribeiro¹,

Couto²,

Migliorini³

et al. 2014

RBAV

View full text Add to dashboard Cite

ResumoA fotoeletrodeposição de partículas de cobre sobre filmes de diamante dopado com boro (DDB) com diferentes níveis de dopagem foi investigada. Ênfases foram dadas no estudo da influência do nível de dopagem dos filmes e na eletrodeposição fotoassistida de cobre utilizando soluções com diferentes pHs (ácido e neutro). Os filmes crescidos foram caracterizados por espectroscopia Raman e a concentração de portadores foi estimada por medidas de Mott-Schottky Plot. Os resultados mostraram que a deposição de partículas de Cu sobre os filmes de DDB apresentou maior homogeneidade nos filmes com maior dopagem (B/C = 30000 ppm) quando comparados aos filmes de menor dopagem (B/C = 5000 ppm). Essa diferença na homogeneidade pode ser atribuída à melhor condutividade do eletrodo mais dopado devido à maior quantidade de boro presente neste filme, potencializando o processo de redução do cobre. Com relação ao meio eletrolítico (ácido, neutro) utilizado nas deposições fotoassistidas, foi observado, em meio neutro, uma melhor eficiência na deposição de Cu. Abstract Copper photoelectrodeposition on boron-doped diamond (BDD) films with different doping levels was investigated. Emphases were given to study the influence of the doping level of the films and of the Cu photoassisted electrodeposition processes using solutions with different pHs (acid and neutral). The films were characterized by Raman spectroscopy and the acceptor densities were estimated by Mott-Schottky Plot. The results showed that the Cu deposits presented more homogeneity for highly doped BDD electrode (B/C = 30000 ppm) when compared to the slightly doped BDD electrode (B/C = 5000 ppm). This difference in the uniformity

show abstract

“…In addition, two bands located at 500 cm -1 and 1220 cm -1 appeared [22]. More recently, Niu et al [23] have discussed the electronic and vibrational properties of heavily BDD. They concluded that the 500 and ~1220 cm -1 bands are both superposed bands, including not only C vibrations but also B-B vibrations and B-C vibrations, respectively.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

A comparative study of copper electrodeposition and photoelectrodeposition on boron doped diamond

Couto

Ribeiro

Migliorini

et al. 2013

Diamond and Related Materials

View full text Add to dashboard Cite

Copper (Cu) electrodeposition and photoelectrodeposition on highly boron-doped diamond films (BDD) were investigated, at two different pH solutions. Cu particles were deposited in the potentiostat mode and under UV irradiation. The as-grown as well as the Cu modified BDD films were characterized by Raman Spectroscopy and Scanning Electron Microscopy. The copper photocatalytic deposition on BDD was discussed taking into account the influence of the photogenerated electrons for photoelectrodeposition process at both acid and neutral pH solutions. Under UV irradiation, the copper deposits presented higher density and uniformity all over the crystal faces when compared with those without UV irradiation.This behavior may be attributed to BDD semiconductor character due to its photogenerated electrons which enhanced the copper reduction reaction.

show abstract

First principles study of structural, electronic and vibrational properties of heavily boron-doped diamond

Cited by 36 publications

References 29 publications

Phase transition in BCx system under high-pressure and high-temperature: Synthesis of cubic dense BC3 nanostructured phase

Phase transition in BCx system under high-pressure and high-temperature: Synthesis of cubic dense BC3 nanostructured phase

Estudo da fotoeletrodeposição de partículas de cobre sobre filmes de diamante dopado com boro

A comparative study of copper electrodeposition and photoelectrodeposition on boron doped diamond

Contact Info

Product

Resources

About