Crystallization of GeO2 thin films into alpha-quartz: from spherulites to single crystals [PDF]
Acta Materialia 215 (2021) 117069, 2020 Piezoelectric quartz SiO2 crystals are widely used in industry as oscillators. As a natural mineral, quartz and its relevant silicates are also of interest of geoscience and mineralogy. However, the nucleation and growth of quartz crystals is difficult to control and not fully understood.
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Optical Rectification and Electro-Optic Sampling in Quartz [PDF]
, 2022 We report electro-optic sampling (EOS) response and terahertz (THz) optical rectification (OR) in z-cut alpha-quartz. Due to its small effective second-order nonlinearity, echo-free waveform of intense THz pulses with a few MV/cm electric-field strength can be measured faithfully with no saturation effect.
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A Coupled-Oscillators Model to Analyze the Interaction between a Quartz Resonator and Trapped Ions [PDF]
, 2022 The novel application of a piezoelectric quartz resonator for the detection of trapped ions has developed in the observation of the quartz-ions interaction under non-equilibrium conditions, opening new perspectives for high-sensitive motional frequency measurements of radioactive particles.
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Thin films of the alpha-quartz SixGe1-xO2 solid-solution [PDF]
arXiv, 2021 SiO2 with the alpha-quartz structure is one of the most popular piezoelectrics. It is widely used in crystal oscillators, bulk acoustic wave (BAW) devices, surface acoustic wave (SAW) devices, and so on. GeO2 can also be crystallized into the alpha-quartz structure and it has better piezoelectric properties, with higher piezoelectric coefficient and ...
arxiv
Thickness-shear Frequencies of an Infinite Quartz Plate with Material Property Variation Along the Thickness [PDF]
Acta Mechanica Solida Sinica, 2019, 2014 Properties of the quartz crystal blank of a resonator is assumed homogeneous, uniform, and perfect in design, manufacturing, and applications. As end products, quartz crystal resonators are frequently exposed to gases and liquids which can cause surface damage and internal degradation of blanks under increasingly hostile conditions.
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Ultra-low supply voltage crystal quartz oscillator [PDF]
, 2021 An ultra-low-voltage crystal quartz oscillator is proposed. The approach to its design is essentially based on using a HEMT operating in unsaturated dc regime and a quartz resonator as a resonant impedance transformer. The 25 MHz prototype shows steady oscillations at the supply voltage of less than 17 mV and the power consumption as low as 300 nW, i.e.
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Probing viscoelastic properties of a thin polymer film sheared between a beads layer and quartz crystal resonator [PDF]
, 2009 We report measurements of viscoelastic properties of thin polymer films of 10-100 nm at the MHz range. These thin films are confined between a quartz crystal resonator and a millimetric bead layer, producing an increase of both resonance frequency and dissipation of the quartz resonator.
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Transparent TiO2 Nanotubes Arrays Directly Grown on Quartz Glass Used in Front- and Back-Side Irradiation Configuration for Photocatalytic H2 Generation [PDF]
Physica Status Solidi (a), Volume 213, Issue 10, pages 2733-2740,
October 2016, 2016 In the present work we explore the front- and back-side performance of a photocatalytic platform consisting of self-organized TiO2 nanotube layers formed by complete anodization of Ti metal films evaporated on quartz slides. The adhesion and light transmission of the tube layers on the quartz surfaces are optimized by a suitable anodization procedure ...
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Mechanical and optical nanodevices in single-crystal quartz [PDF]
, 2017 Single-crystal {\alpha}-quartz, one of the most widely used piezoelectric materials, has enabled a wide range of timing applications. Owing to the fact that integrated thin-film based quartz platform is not available, most of these applications rely on macroscopic, bulk crystal-based devices.
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Soft chemistry assisted On-chip Integration of Nanostructured quartz-based Piezoelectric Microelectromechanical System [PDF]
arXiv, 2020 The development of advanced piezoelectric quartz MEMS for sensing and precise frequency control applications requires the nanostructuration and on chip integration on silicon of this material. However, the current quartz manufacturing methods are based on bonding bulk micromachined crystals on silicon, which limits the size, the performance, the ...
arxiv