Electrochemical processes of nucleation and growth of calcium phosphate on titanium supported by real-time quartz crystal microbalance measurements and X-ray photoelectron spectroscopy analysis

2009 ◽  
Vol 89A (1) ◽  
pp. 270-280 ◽  
Author(s):  
Noam Eliaz ◽  
William Kopelovitch ◽  
Larisa Burstein ◽  
Equo Kobayashi ◽  
Takao Hanawa
Keyword(s):  
Calcium Phosphate ◽  
Real Time ◽  
Quartz Crystal Microbalance ◽  
Photoelectron Spectroscopy ◽  
Quartz Crystal ◽  
Nucleation And Growth ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Electrochemical Processes

Study on Preparation Process of ITO Nano-Powder by the Method of Ammonia Complexation

2012 ◽  
Vol 549 ◽  
pp. 441-444
Author(s):  
Li Da Sun ◽  
Du Shu Huang ◽  
Wei Liu ◽  
Yan Jiang ◽  
Rui Min Xiao ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Nucleation And Growth ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Nano Powder ◽  
Transmission Electron ◽  
Tin Oxides ◽  
Size And Morphology ◽  
Nucleation And Growth Mechanism

ITO (Indium Tin Oxides) nano-powder was prepared by the method of ammonia complexation. The chemical composition, morphology and crystal structure were characterized by X-ray diffraction (XRD) ,transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy analysis(XPS). Base on the nucleation and growth mechanism of the powder, the temperature of heat treatment impacting on size and morphology was discussed briefly. The results showed that the nano-ITO powder of particle size 20nm-40nm with well-pleasing particle shape and dispersion can be prepared at 800°C.

scholarly journals A Real-Time Method for Improving Stability of Monolithic Quartz Crystal Microbalance Operating under Harsh Environmental Conditions

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4166
Author(s):  
Román Fernández ◽  
María Calero ◽  
Yolanda Jiménez ◽  
Antonio Arnau
Keyword(s):  
Real Time ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Limit Of Detection ◽  
Quartz Substrate ◽  
Low Cost ◽  
Discrete Wavelet ◽  
Reagent Consumption ◽  
Measurement Cell ◽  
The Stability

Monolithic quartz crystal microbalance (MQCM) has recently emerged as a very promising technology suitable for biosensing applications. These devices consist of an array of miniaturized QCM sensors integrated within the same quartz substrate capable of detecting multiple target analytes simultaneously. Their relevant benefits include high throughput, low cost per sensor unit, low sample/reagent consumption and fast sensing response. Despite the great potential of MQCM, unwanted environmental factors (e.g., temperature, humidity, vibrations, or pressure) and perturbations intrinsic to the sensor setup (e.g., mechanical stress exerted by the measurement cell or electronic noise of the characterization system) can affect sensor stability, masking the signal of interest and degrading the limit of detection (LoD). Here, we present a method based on the discrete wavelet transform (DWT) to improve the stability of the resonance frequency and dissipation signals in real time. The method takes advantage of the similarity among the noise patterns of the resonators integrated in an MQCM device to mitigate disturbing factors that impact on sensor response. Performance of the method is validated by studying the adsorption of proteins (neutravidin and biotinylated albumin) under external controlled factors (temperature and pressure/flow rate) that simulate unwanted disturbances.

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