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The rapid development of three dimensional packaging makes it necessary to develop smaller and more reliable microbumps. In the electrodeposition process of bump cylinder, the filling quality is largely determined by the combination of additives. In this work, the effect and competitive adsorption between suppressor polyethylene glycol (PEG) and accelerator Bis-(3-sodiumsulfopropyl disulfide) (SPS)...
Lanthanum hexaboride (LaB6) nanowires have attracted much attention due to their outstanding physical properties. In order to enhance the developments of LaB6 nanowires, it is essential to study the field emission (FE) properties of LaB6 nanowires in different environments. Here, we investigate the effect of oxygen (O2) on the FE behaviors of LaB6 nanowires. And it is found that the oxygen content...
In this paper the feasibility of Quartz Crystal Microbalance (QCM) sensors obtained by a facile deposition of TiO2 nanoparticles is presented. The gas sensing performance of these devices are studied by means of an ‘ad hoc’ measurement system, through experiments with two toxic gases, CO and NO2, and with water vapor. The effect of UV irradiation on the sensor response is also studied. The sensors...
In this paper we describe the development of a novel molecularly imprinted sensor (MIS) for detection of isoborneol (ISO) in aqueous solutions. The MIS device consisted of an interdigitated microelectrode coated with a multilayered thin film of TiO2 nanoparticles and sodium sulfonated polystyrene (np-TiO2/PSS) assembled via electrostatic layer-by-layer. Isoborneol was previously imprinted within np-TiO...
In this paper, we introduce a modeling framework for free molecular flow (FMF) processes (such as, deposition processes under an ultra-high vacuum condition) that is suitable for model-based control design. The generic dynamical model is comprised of four important elements present in such processes: (i) particle transfer, which is modeled based on the well-known Knudsen cosine law; (ii) particle...
Desulfurization of diesel fuel was performed using two commercial activated charcoal sorbents. The two activated charcoals used in this study (PAC1 and PAC2) were powders. The desulfurization for diesel fuel was done at room temperature using 10 % by mass of the adsorbents with contact time of 1 hour. The surface chemistry and structure of the sorbent materials were studied using surface area analyzer...
The most promising materials in the development of electro-active material for lithium-ion battery electrodes is the modified carbon black. This paper presents the results of research of carbon black after thermal and thermal oxidative modification by the method of Raman spectroscopy. The spectra and the comparative analysis of the modified samples are listed.
Innovative semiconductor materials, solid substitution solutions CdSxTe1−x with different composition were produced with the help of improved isothermal diffusion. Bulk and surface physicochemical properties — X-ray, electron-microscopic, UV-spectroscopical, acid-base, and adsorptive ones — were studied. Interrelated regularities “property — composition” were devised. Predictions about the surface...
A taste sensor using a lipid/polymer membrane, i.e., an electronic tongue with global selectivity, has been developed for objective evaluation of the taste of foods and beverages. Moreover, the taste sensor has been also contributing to safety of foods, e.g., the sensor membrane with strong hydrophobicity was used to detect sodium dodecyl sulfate (SDS), a negatively charged surfactant, which was generally...
Response surface methodology combined with Box-Behnken experimental design were employed to study the adsorption of U(VI) on microwave activated rice husk ash (ARHA) to elucidate the effects of parameters such as pH, adsorbent dose and U(VI) initial concentration on the adsorption process. Experimental data indicated that pH and adsorbent dose positively affected the adsorption process of U(VI) by...
In this paper, we report first molecular beam study of CO oxidation on a regular array of Pd clusters on alumina. The constant distance with neighbour particles allows to overcome uncertainties in some parameter in the reaction, in comparison of other studies where particles have been grown or deposited on substrates that leads to random distribution. Furthermore, growing such array of particles by...
Hydrogen (H2), carbon monoxide (CO), and some hydrocarbon gases such as methane (CH4), ethane (C2H6), ethylene (C2H4) and acetylene (C2H2) are the typical fault gases extracted from transformer oil. Based on the framework of Density Function Theory (DFT), tin oxide SnO2 surface model, gas molecular models and adsorption models were built, responsibility. A first principles calculation using Cambridge...
Sintering of Ni particles in the Ni-based anode is a major obstacle to the widespread use of solid oxide fuel cell because the sintering induces the degradation in the anode. The large amount of water vapor in the fuel is known to accelerate the degradation during the operation. However, the detailed accelerated sintering mechanism is unclear. In this study, to clear the accelerated sintering mechanism...
Spontaneous isotopic exchange of oxygen atoms between dry powdered Ti16O2 oxygen containing minerals and gaseous C18O2 was studied using gas phase high-resolution Fourier transform infrared absorption spectroscopy of carbon dioxide isotopologues. The absorption rovibrational spectra of all the measured carbon dioxide isotopologues were assigned and used for the quantification of the time-dependent...
In this paper, we present an analytical model for a diffusive molecular communication (MC) system with a reversible adsorption receiver in a fluid environment. The time-varying spatial distribution of the information molecules under the reversible adsorption and desorption reaction at the surface of a bio-receiver is analytically characterized. Based on the spatial distribution, we derive the number...
The most commonly used polymer in microfluidic device fabrication is polydimethylsiloxane (PDMS). Many applications require the functionalization of the surface of PDMS with proteins (e.g. antibodies) which prompted the evaluation of a variety of techniques that have been developed to bind proteins to the surface. such as non-specific binding, protein passive adsorption and activation with Glutaraldehyde...
The present study predicts the feasibility for the adsorptive removal of Victoria Blue dye (VB dye) from aqueous solution using a low cost biosorbent Zizyphus Oenoplia seed (ZOS). In this study, a batch mode adsorption experiments were carried out using various parameters such as pH, contact time, concentration of dye, adsorbent dosage and temperature. The feasibility of the process is evaluated with...
Adsorption of Pb(II) ions onto thermal activated lignin was studied in batch system in order to analyze the potential use of this material as low cost adsorbent for rapid and efficient removal of Pb(II) ions from accidentally polluted waters. The experiments were performed as a function of initial Pb(II) concentration and contact time under optimal experimental conditions (initial solution pH of 6...
This paper describes the development of a new ionic palladium catalyst, CIRCUPOSIT™6530 Catalyst, along with a tartrate-based horizontal electroless copper bath, CIRCUPOSIT™6550, to meet the performance demands of high-density-interconnect (HDI) and packaging (PKG) substrates in horizontal electroless copper plating. Implementation of the new ionic catalyst process is demonstrated through excellent...
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