Solution-gated graphene field effect transistors (SGGT) were integrated in microfluidic systems. The transfer characteristics of a SGGT with an Ag/AgCl gate electrode shifted horizontally the change ionic concentration KCl solution microchannel and relationship can be fitted Nernst equation, which was attributed to potential drop at electrode. Therefore is one important factor for ion sensitive property SGGT. Then SGGTs used as flow velocity sensors, based on measuring streaming potentials...

ZnO thin films with various thicknesses were prepared onto glass substrates by pulsed laser deposition. The crystallinity, microstructure and surface morphology of investigated X-ray diffraction (XRD), scanning electron microscopy (SEM) probe (SPM). As the thickness increased, grain size roughness increased as well tensile stress decreased. Also, to study optical-electrical properties films, we tested carrier concentration, mobility, resistivity, impedance spectroscopy optical transmission...

ZnO films are prepared on glass substrates by pulsed laser deposition (PLD) at different oxygen pressures, and the effects of pressure structure optoelectrical properties as-grown investigated. The results show that crystallite size surface roughness increase, but carrier concentration optical energy gap Eg decrease with increasing pressure. Only UV emission is found in photoluminescence (PL) spectra all samples, its intensity increases Furthermore, there marked differences between grown low...

The collection of twelve bronze artifacts discovered in Xichuan provides invaluable historical insights into the Warring States period (476 BC to 221 BC) ancient China. To investigate their fabrication techniques and current state preservation, a comprehensive analysis was conducted using metallographic microscope, scanning electron an spectrometer examine microstructure elemental composition artifacts. findings revealed that copper content these varied between 41.82% 87.95%, tin ranged from...

Water can trigger freeze–thaw cycles, acid rain corrosion, and microbial colonisation, all of which destroy stone. is one the most influential factors in destruction outdoor stone heritage. Therefore, materials with excellent hydrophobic properties durability are urgently required to effectively retard long-term weathering. In this study, two nanoparticles, TiO2 SiO2, were used modify dodecyltrimethoxysilane (DTMS), a waterproof coating commonly for heritage protection, fabricate...

In the conservation of cultural relics, application Paraloid B72 in humid environments frequently results surface whitening artifacts, which impairs their appearance and conceals important details. This study investigates mechanisms underlying this phenomenon by examining effect ambient humidity, mass concentration, solution addition volume, solvent type. To evaluate microstructure, transmittance, composition films, a range analytical techniques were employed, including optical microscopy,...

Abstract In this study, in order to analyze the materials and techniques used for production of inscribed plaques, multi-analytical scientific approach, including optical microscopy (OM), scanning electron with energy dispersive X-ray spectroscopy (SEM–EDS), diffraction (XRD), micro-attenuated total reflection Fourier transform infrared (μ-ATR-FTIR), micro-Raman (μ-Raman), were explore utilized create “Chun Rong Xuan Mao” birthday plaque Qing Dynasty. The results showed that was made cypress...

Moisture-curable polyurethane (MCPU) is a specifically designed material for the consolidation of fragile cultural objects in high-humidity environments. In order to solve problem its susceptibility yellowing due heat ageing, polyhedral oligomeric silsesquioxane (POSS) was added MCPU prepare POSS/MCPU. The appearance, stability and mechanical properties POSS/MCPU films were characterized using UV–Vis spectrophotometer, gloss meter, colorimeter, thermal analyzer universal testing machine....

A series of polymer electrolytes was synthesized to fabricate dye-sensitized solar cells by a novel polysaccharide agarose as matrix, 1-methyl-2-pyrrolidinone (NMP) plasticizers, lithium iodide (LiI)/iodine (I 2 ) redox couple and titania nanoparticles an absorber. The with different concentrations (1-5 wt %) were systematically studied differential scanning calorimetry (DSC) the AC impedance spectra. photoelectric performances DSSCs content investigated. Increasing concentration led...

To preserve fragile organic cultural objects in humid archaeological excavation sites, a moisture-curable polyurethane (MCPU) as consolidant was synthesized and employed. Relevant instruments were utilized to test properties such colour, transmittance, mechanical properties, hydrophobicity ageing resistance. Furthermore, residues of Zhusi, vessel made plant fibres excavated consolidated. The results illustrated that MCPU cured for 12 h formed transparent, colourless flexible films....

This paper aims to study the effect of a hindered amine light stabilizer (HALS 770), on aging behavior moisture-curable polyurethane (MCPU). MCPU is specifically developed by ourselves for reinforcement fragile organic cultural relics in high-humidity environments, but its resistance insufficient. To improve MCPU, HALS 770 was used prepare modified (MMCPU). A colorimeter, an infrared spectrometer and thermal analyzer were characterize color structure changes MMCPU during determine their...

Tomb No. 2 of Tushan in Xuzhou is the tomb King Chu Eastern Han Dynasty, and it was an important archaeological discovery China. The unique placement crafting techniques a lacquer coffin that unearthed from burial corridor are significant importance study tombs. In order to characterise sample’s microstructure, elemental composition, structural as well corridor, range analytical were employed, including ultra-depth microscopy, scanning electron microscopy with SEM-EDS, Raman spectroscopy,...

<bold>Background/Purpose:</bold> Based on the investigation and analysis of current situation physical activity, family objective environment, executive function development children aged 4–6 years, this study analyzed correlation between three, so as to explore influence environment activity function, provide a reference for families kindergartens formulate effective interventions improve level preschoolers. <bold>Method:</bold> A total 123 preschool years old in kindergarten Beijing were...

The performance of harvesting energy using piezoelectric cymbal transducers has been studied from gentle mechanical vibration under different pre-stress conditions. transducer was fixed at 12.9 mm diameter and evaluated the output power an AC force 0.7 N. maximum reached 3.7mW with a slight stress level 0.17 N across 50 kohm resistor for 730 Hz. resonance frequency shifted to lower value increased increased. analytical results were found be in good agreement experimental results. It is...

A novel approach has been developed to fabricate an oriented flat porous carbon (OFPC) by combining the polymerizationinduced phase separation and pyrolysis (PIPSP) directional compressive deformation (DCD). At first, elastic body in shape of cylinder is obtained controlling polymerization degree resin, then application symmetrical axial pressures results two interconnected phases (of a polymerized resin poreforming agent phase) body. Then deformed transformed rigid precuring further cured...

Abstract The “ Tian Di Chang Chun ” horizontal plaque inscribed by the general Feng Yü-hsiang in R.O.C. 25 (1936) shows his patriotic, compassionate, fair, and just thoughts ideals. It has significant educational value for contemporary society. However, due to aging of materials some factors preservation environment, coloured decorative coating on surface shed. digital microscope system, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD)...

Abstract In situ consolidation is the most common treatment to conserve cultural relics, but materials for preserving fragile organic relics in humid archaeological excavation sites are scarce. To solve problem, a moisture-curable polyurethane (MCPU) prepolymer was synthesized by reacting isophorone diisocyanate with polyethylene glycol 600. The standard acetone–dibutylamine method, Fourier transform infrared spectroscopy, gel chromatography and thermogravimetric analysis were utilized...