No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
The mass of the deposited film on the quartz crystal's surface is indicated by the change of its resonance frequency. With the introduction of the z -match EM technique in the …
In this article, new insights about the metals-porphyrin complexes are proved by analyzing the zinc, nickel and chromium adsorption process over the well-known porphyrin …
Titanium dioxide thin films on the inner wall of quartz tubes were prepared in situ by the sol–gel method. Meanwhile, copper and cerium were loaded onto the surface of the titanium dioxide thin films to enhance photocatalytic activity and broaden the range of light absorption. X-ray diffractometer, X-ray photoelectron spectroscopy, scanning electron …
The concentration of NH 4 P 5 W 30 POM dipping solution is taken as 5 mM for improved adsorption. ... Formation of Multilayer Film on Gold Quartz Electrode. The gold crystal electrodes were modified using the same technique used to create multilayer films on gold electrodes. After cleaning the gold quartz electrodes, the electrode was fitted ...
We report the epitaxial growth of nanostructured polycrystalline quartz films on silicon [Si (100)] substrates via the solution deposition and gelation of amorphous silica thin …
We did a simple experiment using the layer-by-layer method to build a porous film onto the quartz crystal plate. By fitting our model to the experimental changes in the resonant frequency and …
A solid-state pulsed laser technique was developed to in situ grow arbitrary immobilized catalysts (Fe 3 O 4, CeO 2, WO 3 etc.) on the inner surface of quartz tube with robust adhering strength. In a case study, anatase/rutile hetero-phase TiO 2 film was deposited to serve as immobilized photocatalysts for the effective removal of antibiotics from aqueous environment.
Thin film materials for photovoltaics such as cadmium telluride (CdTe), copper-indium diselenide-based chalcopyrites (CIGS), and lead iodide-based perovskites offer the potential of lower solar ...
In this work, the combination of an electrodeless quartz crystal microbalance (EL-QCM) and spectrometric techniques was designed to investigate the adsorption kinetics of iodine onto two metal-organic frameworks film, MIL-101 and ZIF-67. The concentrations of I 2 adsorbed on film and in vapor phase were monitored simultaneously in real time by ...
The correlation between the ammonia concentration and quartz resonator's frequency was investigated. The con- centrations used were 10, 100, 500, 1000 and 5000 ppm. ... Thus the system quartz resonator-thin SnO; film could be used for development of high- sensitive acoustic sensors for monitoring NH3 contaminations in the environment close to ...
(1) Use of only a single quartz filter to measure concentrations of carbonaceous particulate matter may result in gross overestimation. (2) The tandem filter method can be used to correct for the positive artifact. A quartz filter behind a Teflon filter (QBT) is a better measure of this artifact compared to the backup (QBQ) filter of a QQ pair.
Antimony-doped indium oxide thin films were deposited on quartz substrates by radio-frequency (RF) magnetron sputtering at various growth temperatures in the range of 25–400 °C.
The Quartz Crystal Microbalance with Dissipation (QCM-D) represents a sophisticated advancement in QCM technology, enabling the tracking of mass variations and vibrational energy dissipation [49].QCM-D, through the application of multi-frequency excitation and assessing both the resonance and damping frequency alterations in a quartz crystal, …
Quartz crystal microbalance with dissipation (QCM-D) monitoring is a powerful tool used to sensitively examine the real-time responses of polymer films to external responses. For example, the technique is commonly used to monitor film growth, material adsorption, thin film …
The effect of salt (sodium chloride) concentration on the drainage of a thin aqueous film between a hydrophilic quartz surface and a fast approaching air bubble has been studied using scanning ...
This study investigates the impact of transparent conducting substrates, specifically indium-doped tin oxide (ITO) and fluorine-doped tin oxide (FTO), on the structural and optical characteristics of thermally evaporated Titanium phthalocyanine chloride (TiPcCl2) thin films. The crystalline structure of TiPcCl2/quartz thin films was verified by X-ray powder …
INTRODUCTION. High concentration protein solutions are increasingly being used for delivery of drugs in the biopharmaceutical field. They typically contain protein concentrations in excess of 100 mg/mL 1, 2 and may be as high as 200 mg/mL or more. While it is anticipated that proteins can be formulated within this range, high concentrations of proteins …
Quartz crystal microbalance with dissipation (QCM‐D) monitoring is a powerful tool used to sensitively examine the real‐time responses of polymer films to external responses.
Zirconium oxide thin films were grown successfully by thermal annealing of zirconium thin films deposited on quartz and silicon substrates by direct current magnetron sputtering technique. The structural and optical properties in relation to thermal annealing times were investigated. The X-ray diffraction patterns revealed that structure of films changes from …
We previously showed that, among many different cations, only Sr 2+, Ba 2+, and Ca 2+ demonstrated epitaxial growth of macroporous α-quartz films on (100) silicon substrates. 4 To understand the mechanism, the ratio of Sr 2+ to SiO 2 was varied and correlated to the quality and orientation of α-quartz films (Figure 6a,b). 45 For ratios larger ...
The use of the Electrochemical Quartz Crystal Microbalance (EQCM) to study the proton intercalation performance of thin film Ni(OH) 2 layers, nowadays widely used as cathode electrode material in rechargeable Ni(OH) 2-based battery systems such as NiMH and NiCd, is reviewed.In addition, the impact of incorporating foreign metals in these layers on the …
b-oriented ZSM-5 zeolite film was synthesized on the macropore α-quartz substrate modified with titanium dioxide (TiO2), polyvinyl acetate (PVA), and chitosan (CTS) by hydrothermal crystallization.
As was previously reported, 13 quartz crystal microbalance (QCM) measurements in their simple gravimetric mode were applied to determine porosity of Au films fabricated from …
A quartz film thickness gauge containing a reference crystal oscillator, a measuring crystal oscillator, a frequency converter connected to the outputs of the reference and measurement oscillators, a quartz sensor included as an oscillating circuit in the measurement generator, an intermediate frequency value indicator connected to the output ...
The quality (Q) factor is an important parameter for the high-performance quartz crystal microbalance (QCM) sensor. We propose a high Q factor QCM ammonia sensor based on a sandwich sensing structure with reduced graphene oxide film (rGO) and a layer-by-layer (LBL) self-assembled film. Due to the high elastic modulus of the rGO isolation layer, the surface …
Noteworthy, only samples with a concentration of 1 mmol of Sr2+ (Sr/Si molar ratio of 0.06) within the amorphous silica matrix have the right quantity and homogeneous dispersion of salt to permit further crystallization into a (100) epitaxial quartz film (Figure 4d and e).
The electrochemical quartz crystal microbalance is a versatile technique for studying several aspects of electroactive polymer film dynamics. For rigid films, it is a sensitive probe of mobile species (ion and solvent) population changes within the film in response to redox switching. For non-rigid films, it can be used to determine film shear ...
A multi-wavelength diode laser absorption sensor was investigated for real-time monitoring of the thickness, solute concentration and temperature of thin films of liquid solutions, and the concept was demonstrated with aqueous NaCl solutions. The sensor monitors the transmittance of laser intensity of four near-infrared diode lasers through a thin liquid film …
2.1.2 Gel films by dip-coating. Mono-layer gel films on 525 μm thick boron-doped Si (100) substrates with a conductivity of 5–10 ohm cm (Active Business Company ) and typical dimensions of 2 cm by 5 cm were prepared with a ND-DC300 dip-coater (Nadetech Innovations) equipped with an EBC10 Miniclima Device to control the surrounding temperature and relative …
The CNTs/quartz fiber film was fabricated through growth of CNTs upon pure quartz fiber using chemical vapor deposition method. ... the daytime average O3 concentrations increased significantly at ...
