Comparison between photoemitting and colloidal properties of nanodiamond particles
| العنوان: | Comparison between photoemitting and colloidal properties of nanodiamond particles |
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| المؤلفون: | Giuseppe Perna, Vittorio Capozzi, L. Velardi, Gerardo Palazzo, Antonio Valentini, G. Cicala |
| المصدر: | Colloids and surfaces. A, Physicochemical and engineering aspects 532 (2017): 493–500. doi:10.1016/j.colsurfa.2017.04.018 info:cnr-pdr/source/autori:Cicala, G.; Velardi, L.; Palazzo, G.; Valentini, A.; Perna, G.; Capozzi, V./titolo:Comparison between photoemitting and colloidal properties of nanodiamond particles/doi:10.1016%2Fj.colsurfa.2017.04.018/rivista:Colloids and surfaces. A, Physicochemical and engineering aspects (Print)/anno:2017/pagina_da:493/pagina_a:500/intervallo_pagine:493–500/volume:532 |
| بيانات النشر: | Elsevier BV, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Hydrogen treatment, Materials science, Aqueous dispersion, Analytical chemistry, Nanotechnology, 02 engineering and technology, Photocathode, engineering.material, 010402 general chemistry, 01 natural sciences, Quantum efficiency, Colloid and Surface Chemistry, Phase (matter), Zeta potential, Graphite, Nanodiamond, Diamond, Nanodiamond particle, 021001 nanoscience & nanotechnology, 0104 chemical sciences, engineering, Surface modification, Particle, 0210 nano-technology |
| الوصف: | In this paper, we present an investigation on two types of nanodiamond (ND) powders with average size of particles around 250 nm and having different sp2 (graphite phase) and sp3 (diamond phase) carbon contents. The ND surface modification is carried out by physical methods i.e. treatments in H2 microwave plasma. The quantum efficiency (QE) of photocathodes and the stability of aqueous dispersions are assessed by photoemission and zeta potential (ZP) measurements, respectively. The resultant hydrogenated surface affects in the solid state the QE of ND-based photocathodes and in solution the particle ZP. The effect of the hydrogen treatment is beneficial inducing an enhancement of photocathode QE and a corresponding increase of the ZP. A schematized energy diagram is proposed to illustrate and explain the strong correlation between QE and ZP parameters. |
| تدمد: | 0927-7757 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fee7acb5af371def1a569964ddf583c https://doi.org/10.1016/j.colsurfa.2017.04.018 |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....3fee7acb5af371def1a569964ddf583c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 09277757 |
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