Anomalous Formation of Irradiation-Induced Nitrogen-Vacancy Centers in 5 nm-Sized Detonation Nanodiamonds
Anomalous Formation of Irradiation-Induced Nitrogen-Vacancy Centers in 5 nm-Sized Detonation Nanodiamonds
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5 nm 尺寸爆炸纳米金刚石中辐照诱导氮空位中心的异常形成
DOI:
10.1021/acs.jpcc.1c10466
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Segawa Takuya F.
中科院分区:
文献类型:
--
作者:
So Frederick T.-K.;Shames Alexander I.;Terada Daiki;Genjo Takuya;Morishita Hiroki;Ohki Izuru;Ohshima Takeshi;Onoda Shinobu;Takashima Hideaki;Takeuchi Shigeki;Mizuochi Norikazu;Igarashi Ryuji;Shirakawa Masahiro;Segawa Takuya F.
Nanodiamonds containing negatively charged nitrogen-vacancy (NV–) centers are versatile room-temperature quantum sensors in a growing field of research. Yet, knowledge regarding the NV–formation mechanism in very small particles is still limited. This study focuses on the formation of the smallest NV–-containing diamonds, 5 nm detonation nanodiamonds (DNDs). As a reliable method to quantify NV–centers in nanodiamonds, half-field signals in electron paramagnetic resonance (EPR) spectroscopy are recorded. By comparing the NV–concentration with a series of nanodiamonds from high-pressure high-temperature (HPHT) synthesis (10–100 nm), it is shown that the formation process in 5 nm DNDs is unique in several aspects. NV–centers in DNDs are already formed at the stage of electron irradiation, without the need for high-temperature annealing, an effect related to the very small particle size. Also, the NV–concentration (in atomic ratio) in 5 nm DNDs surpasses that of 20 nm-sized nanodiamonds, which contradicts the observation that the NV–concentration generally increases with particle size. This can be explained by the 10 times higher concentration of substitutional nitrogen atoms in the studied DNDs ([NS≈ 1000 ppm]) compared to the HPHT nanodiamonds ([NS≈ 100 ppm]). Upon electron irradiation at a fluence of 1.5 × 1019e–/cm2, DNDs show a 12.5-fold increment in the NV–concentration with no sign of saturation reaching 1 out of about 80 DNDs containing an NV–center. These findings can be of interest for the creation of defects in other very small semiconductor nanoparticles beyond NV-nanodiamonds as quantum sensors.
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DOI:
10.1016/j.physe.2022.115523
发表时间:
2019
期刊:
Physica E: Low-dimensional Systems and Nanostructures
影响因子:
--
作者:
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DOI:
10.1021/acsanm.1c00334
发表时间:
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期刊:
--
影响因子:
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Shingo Sotoma;Y. Harada
影响因子:
3.7
作者:
Panich, A. M.;Shames, A. I.;Vul, A. Ya.
通讯作者:
Vul, A. Ya.
DOI:
10.1021/acs.jpclett.0c01922
发表时间:
2020
期刊:
The journal of physical chemistry letters
影响因子:
--
作者:
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通讯作者:
A. Shames
DOI:
10.1103/physrevb.54.6988
发表时间:
1996
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Twitchen;Newton;Baker;Tucker;Anthony;Banholzer
通讯作者:
Banholzer