Photoluminescence Studies of Ge-Doped Silicon Nanocrystals and Silicon Oxide Nanoparticles

2010 ◽  
Author(s):  
Torsten Schmidt ◽  
Libo Ma ◽  
Friedrich Huisken ◽  
Elisabetta Borsella
Keyword(s):  
Silicon Nanocrystals ◽  
Silicon Oxide ◽  
Oxide Nanoparticles ◽  
Doped Silicon ◽  
Silicon Oxide Nanoparticles ◽  
Photoluminescence Studies

scholarly journals Исследование влияния добавки наночастиц гидрофобного оксида кремния на коллоидную устойчивость обратных эмульсий

2021 ◽  
Vol 47 (15) ◽  
pp. 11
Author(s):  
Е.И. Михиенкова ◽  
А.В. Минаков ◽  
С.В. Лысаков ◽  
А.Л. Неверов ◽  
М.И. Пряжников
Keyword(s):  
Silicon Oxide ◽  
Experimental Studies ◽  
Sio2 Nanoparticles ◽  
Oxide Nanoparticles ◽  
Volume Fractions ◽  
Mineral Oils ◽  
Low Concentrations ◽  
Silicon Oxide Nanoparticles ◽  
The Stability ◽  
Hydrophobic Sio2

The results of experimental studies of the effect of the addition of silicon oxide nanoparticles on the stability of inverse emulsions based on mineral oils are presented. The concentration of nanoparticles in the emulsion was varied from 0.25 to 2 wt%. The following ratios of the volume fractions of the hydrocarbon phase and water were investigated: 70/30, 80/20, 90/10. Several types of emulsifiers have been considered. It has been shown that, even at low concentrations, hydrophobic SiO2 nanoparticles significantly improve the stability of inverse emulsions. Destabilization rate of the emulsion upon addition of 2 wt%. of nanoparticles decreases 1.7 times.

scholarly journals Crystalline Evaluation of Size-Controlled Silicon and Silicon Oxide Nanoparticles Produced by Solution Plasma Discharge

2019 ◽  
Vol 60 (5) ◽  
pp. 688-692 ◽  
Author(s):  
Hitoshi Sasaki ◽  
Genki Saito ◽  
Norihito Sakaguchi ◽  
Ryo Ota ◽  
Heishichiro Takahashi
Keyword(s):  
Silicon Oxide ◽  
Plasma Discharge ◽  
Oxide Nanoparticles ◽  
Silicon Oxide Nanoparticles ◽  
Size Controlled

scholarly journals Absence of free carriers in silicon nanocrystals grown from phosphorus- and boron-doped silicon-rich oxide and oxynitride

2018 ◽  
Vol 9 ◽  
pp. 1501-1511 ◽  
Author(s):  
Daniel Hiller ◽  
Julian López-Vidrier ◽  
Keita Nomoto ◽  
Michael Wahl ◽  
Wolfgang Bock ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Silicon Oxide ◽  
Chemical Vapour ◽  
Atom Probe ◽  
Silicon Oxynitride ◽  
Pure Silicon ◽  
Free Carriers ◽  
Boron Doped ◽  
Doped Silicon ◽  
B Doping

Phosphorus- and boron-doped silicon nanocrystals (Si NCs) embedded in silicon oxide matrix can be fabricated by plasma-enhanced chemical vapour deposition (PECVD). Conventionally, SiH4 and N2O are used as precursor gasses, which inevitably leads to the incorporation of ≈10 atom % nitrogen, rendering the matrix a silicon oxynitride. Alternatively, SiH4 and O2 can be used, which allows for completely N-free silicon oxide. In this work, we investigate the properties of B- and P-incorporating Si NCs embedded in pure silicon oxide compared to silicon oxynitride by atom probe tomography (APT), low-temperature photoluminescence (PL), transient transmission (TT), and current–voltage (I–V) measurements. The results clearly show that no free carriers, neither from P- nor from B-doping, exist in the Si NCs, although in some configurations charge carriers can be generated by electric field ionization. The absence of free carriers in Si NCs ≤5 nm in diameter despite the presence of P- or B-atoms has severe implications for future applications of conventional impurity doping of Si in sub-10 nm technology nodes.

Preparation and thermoelectric characterization of phosphorus-doped silicon nanocrystals/silicon oxide multilayers

2019 ◽  
Author(s):  
H. Kobayashi ◽  
R. Akaishi ◽  
S. Kato ◽  
M. Kurosawa ◽  
N. Usami ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Silicon Oxide ◽  
Doped Silicon ◽  
Phosphorus Doped

Covalent immobilization of β-1,4-glucosidase from Agaricus arvensis onto functionalized silicon oxide nanoparticles

2010 ◽  
Vol 89 (2) ◽  
pp. 337-344 ◽  
Author(s):  
Raushan Kumar Singh ◽  
Ye-Wang Zhang ◽  
Ngoc-Phuong-Thao Nguyen ◽  
Marimuthu Jeya ◽  
Jung-Kul Lee
Keyword(s):  
Silicon Oxide ◽  
Covalent Immobilization ◽  
Oxide Nanoparticles ◽  
Silicon Oxide Nanoparticles

Preparation and Characterization of Ophthalmic Lens Materials Containing Titanium Silicon Oxide and Silver Nanoparticles

2015 ◽  
Vol 15 (10) ◽  
pp. 8016-8022 ◽  
Author(s):  
Jung-Won No ◽  
Dong-Hyun Kim ◽  
Min-Jae Lee ◽  
Duck-Hyun Kim ◽  
Tae-Hun Kim ◽  
...  
Keyword(s):  
Contact Angle ◽  
Silver Nanoparticles ◽  
Refractive Index ◽  
Optical Properties ◽  
Silicon Oxide ◽  
Saline Solution ◽  
Oxide Nanoparticles ◽  
Silicon Oxide Nanoparticles ◽  
Titanium Silicon

Hydrogel ophthalmic lenses containing fluorine-substituted aniline group, titanium silicon oxide nanoparticles, and silver nanoparticles were copolymerized, and the physical and optical properties of the hydrogel lenses were measured. To produce the hydrophilic ophthalmic lenses, the additives were added to the mixture containing HEMA, NVP, MA, EGDMA, and AIBN. The cast mold method was used for the manufacture of the hydrogel ophthalmic lenses, and the produced lenses were completely soaked in a 0.9% NaCl normal saline solution for 24 hours for hydration. The physical properties of the produced macromolecule showed that the water content was 32.5–37.6%, the refractive index was 1.450–1.464, the UV-B transmittance was 0.5–35.2%, and the contact angle was between 56 and 69°. Also, the addition of aniline, titanium silicon oxide, and silver nanoparticles allowed the ophthalmic lenses to block UV. These results show that the produced macromolecule can be used as hydrophilic lenses for ophthalmologic purposes that can block UV.

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