Horizontal Alignment of Chemical Vapor-Deposited SWNTs on Single-Crystal Quartz Surfaces: Further Evidence for Epitaxial Alignment

2009 ◽  
Vol 113 (39) ◽  
pp. 17087-17096 ◽  
Author(s):  
Agnieszka Rutkowska ◽  
David Walker ◽  
Semen Gorfman ◽  
Pam A. Thomas ◽  
Julie V. Macpherson
Keyword(s):  
Single Crystal ◽  
Chemical Vapor ◽  
Horizontal Alignment ◽  
Chemical Vapor Deposited ◽  
Single Crystal Quartz ◽  
Crystal Quartz

scholarly journals Terahertz and Microwave Optical Properties of Single-Crystal Quartz and Vitreous Silica and the Behavior of the Boson Peak

2021 ◽  
Vol 11 (15) ◽  
pp. 6733
Author(s):  
Mira Naftaly ◽  
Andrew Gregory
Keyword(s):  
Single Crystal ◽  
Silica Glass ◽  
Broad Band ◽  
Peak Frequency ◽  
Vitreous Silica ◽  
Peak Height ◽  
Fused Silica ◽  
Boson Peak ◽  
Single Crystal Quartz ◽  
Crystal Quartz

Z-cut single-crystal quartz and vitreous silica (silica glass or fused silica) were evaluated for use as reference materials for terahertz and microwave measurements of complex permittivity, with Z-cut quartz confirmed as being suitable. Measurements of refractive indices and absorption coefficients for o-ray and e-ray in quartz and for vitreous silica are reported at frequencies between 0.2 and 6 THz and at 36 and 144 GHz, and compared with data reported in the literature. A previously unreported broad band was seen in the extraordinary absorption of quartz. The Boson peak in silica glass absorption was examined, and for the first time, two negative relationships have been observed: between the refractive index and the Boson peak frequency, and between the Boson peak height and its frequency.

Temperature dependent mobility in single‐crystal and chemical vapor‐deposited diamond

1993 ◽  
Vol 73 (6) ◽  
pp. 2888-2894 ◽  
Author(s):  
L. S. Pan ◽  
D. R. Kania ◽  
P. Pianetta ◽  
J. W. Ager ◽  
M. I. Landstrass ◽  
...  
Keyword(s):  
Single Crystal ◽  
Chemical Vapor ◽  
Temperature Dependent ◽  
Chemical Vapor Deposited

scholarly journals Mechanical and optical nanodevices in single-crystal quartz

2017 ◽  
Vol 111 (26) ◽  
pp. 263103 ◽  
Author(s):  
Young-Ik Sohn ◽  
Rachel Miller ◽  
Vivek Venkataraman ◽  
Marko Lončar
Keyword(s):  
Single Crystal ◽  
Single Crystal Quartz ◽  
Crystal Quartz

Single Crystal Quartz a Replacement for Diamond Optical Windows

2008 ◽  
Author(s):  
Jessica Sheehan
Keyword(s):  
Single Crystal ◽  
Atomic Force Microscope ◽  
Surface Defect ◽  
High Pressures ◽  
Modulus Of Rupture ◽  
Surface Conditions ◽  
Atomic Force ◽  
Single Crystal Quartz ◽  
Expected Values ◽  
Crystal Quartz

Diamond windows are used extensively in the field of optics due to their high transmittance and durability. However, despite their ability to withstand high pressures, diamond windows are not scratch resistant and need to be replaced when the surface is damaged. Moreover, the high cost of diamond windows necessitates extra care to protect the windows and limits the practical size of the window or lens. Thus, alternatives to the highly expensive diamond windows are needed in the optical sciences. A study of single crystal quartz has been conducted to determine if it will make a suitable replacement material. Since the transmittance of single crystal quartz is well documented and desirable for this application, only strength and surface defect experiments were conducted. Trials were run to determine the modulus of rupture of single crystal quartz samples which were also examined with an interferometer and an atomic force microscope (AFM) to correlate the surface conditions with the modulus of rupture. The results showed that even relatively numerous and large defects on the surface did resulted in single crystal quartz holding to high pressures. In addition, the measured modulus of rupture far exceeded the expected values proving that the single crystal quartz is able to withstand the pressures of vacuum. Single crystal quartz is thus found to be a viable alternative to diamond optical windows.

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