Copper nanoparticles with a size of about 150 nm were prepared in toluene using oleic acid as protecting agent. The nanoparticles were used to prepare conductive Cu ink with a polyurethane binder. Oleic acid was used ...
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Copper nanoparticles with a size of about 150 nm were prepared in toluene using oleic acid as protecting agent. The nanoparticles were used to prepare conductive Cu ink with a polyurethane binder. Oleic acid was used to prevent the nanoparticles from oxidization and agglomeration. The prepared Cu nanoparticles were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The resistivity of the copper film on glass substrate that was prepared using Cu nanoparticle ink reached about 1.5× 10-4 2. cm-1 after it was annealed to 120 ~C. Both the nanoparticle ink and the films were characterized by XRD, fourier transform infrared （FT-IR）, and the thermogravimetry-differential scanning calorimetry instrument （TG- DSC）.
In order to utilize the exhaust heat of internal combustion engine effectively and enhanceits fuel economy, a test bench used in Automobile Exhaust Thermoelectric Generator (AETEG) isdesigned in this paper, the main c...
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TiO_(2)-rich Ba-Ti-O films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD).Their phase relationship and microstructure were *** single-phase BaTi_(2)O_(5),Ba_(4)Ti_(13)O_(3)0 and B...
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TiO_(2)-rich Ba-Ti-O films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD).Their phase relationship and microstructure were *** single-phase BaTi_(2)O_(5),Ba_(4)Ti_(13)O_(3)0 and BaTi_(5)O_(11) films were prepared at Ti/Ba molar ratios m_(Ti/Ba)=1.84-1.90,2.83 and 4.49-4.55,*** high deposition rate of TiO_(2)-rich Ba-Ti-O films ranged from 54.0μm/h to 177.6μm/*** permittivity of BaTi_(2)O_(5)film(prepared at m_(Ti/Ba)=1.84 and deposition temperature T_(dep)=877 K),Ba_(4)Ti_(13)O_(3)0 film(prepared at m_(Ti/Ba)=2.83 and T_(dep)=914 K)and BaTi5O11 film(prepared at m_(Ti/Ba)=4.49 and T_(dep)=955 K)were 50,40 and 21,respectively.
TiO_(2) thin films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD)*** effects of laser power(P_(L))and total pressure(p_(tot))on the microstructure of TiO_(2) thin films were *** d...
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TiO_(2) thin films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD)*** effects of laser power(P_(L))and total pressure(p_(tot))on the microstructure of TiO_(2) thin films were *** deposition temperature(T_(dep))was mainly affected by P_(L),increasing with P_(L) *** single-phase rutile TiO_(2) thin films with different morphologies were *** morphologies of TiO_(2) thin films were classified into three typical types,including the powdery,Wulff-shaped and granular microstructures.p_(tot) and T_(dep) were the two critical factors that could be effectively used for controlling the morphology of the films.
One-dimensional nanomaterials have offered a range of unique advantages in many energy related fields, such as a short Li-ion insertion/extraction distance, facile strain relaxation upon electrochemical cycling, enhan...
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In this paper, highly dispersive nanosized copper particles with a mean particle size of less than 6 nm are prepared by an environmentally friendly chemical reduction method. Non-toxic L-ascorbic acid acts as both red...
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In this paper, highly dispersive nanosized copper particles with a mean particle size of less than 6 nm are prepared by an environmentally friendly chemical reduction method. Non-toxic L-ascorbic acid acts as both reducing agent and antioxidant in ethylene glycol in the absence of any other capping agent. Transmission electron microscopy （TEM） is used to characterize the size and morphology of Cu nanoparticles. The results of UV-Vis spectroscopy （UV-Vis）, energy dispersive spectroscopy （EDS） and high resolution TEM （HRTEM） illustrate that the resultant product is pure Cu nanocrystals. The size of Cu nanoparticles is remarkably impacted by the order of reagent addition, and the investigation reveals the reaction procedure of Cu^2＋ ions and L-ascorbic acid.
We propose a rapid and solvent-flee route for synthesizing luminous carbon clusters by controlling carbonization of polyethylene glycol （PEG）. This approach does not involve solvents yet uses the precursor itself as...
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We propose a rapid and solvent-flee route for synthesizing luminous carbon clusters by controlling carbonization of polyethylene glycol （PEG）. This approach does not involve solvents yet uses the precursor itself as suspend- ing medium, thus features mild and green chemistry, and also enables the formation of uniform-sized carbon clus- ters, of which the diameter can be easily tuned from 0.7 to 3.5 nm via control of reaction time. In term of the di- mension, the resultants are denoted as sub-nano carbon clusters （SNCs） and carbon dots （CDs）, respectively. Bene- fiting from surface anchored PEG segments, both of the two show favorable flowability at room temperature and excellent solubility in aqueous and organic solvents. Comparison of their optical performances and structures re- veals that they share the same chromophores. Particularly, the SNCs demonstrate robust photo- and pH-stable pho- toluminescence and can be directly applied to cell-imaging regarding to its prominent biocompatibility. Moreover, its quantum yield （5.5%）, which is approximately 3 times higher than that of CDs （1.5%）, can be dramatically en- hanced to 18.8% by facile chemical reduction. We anticipate that these PEG derivatives marked with easy synthesis, controllable optical performances and excellent physical properties will be highly appealing in future applications.
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