نتایج جستجو برای: نانوذرات cuo
تعداد نتایج: 11314 فیلتر نتایج به سال:
A non-invasive method for detecting glucose is pursued by millions of diabetic patients to improve their personal management of blood glucose. In this work, a novel CuO nanoparticles (NPs) decorated polycaprolactone@polypyrrole fibers modified indium-tin oxide (denoted as CuO/PCL@PPy/ITO) electrode has been fabricated by electrospinning combined with the electrodeposition method for non-enzymat...
We demonstrate hydrothermal synthesis of coral-like CuO nanostructures by selective growth on ZnO nanorods (NR) at low temperatures. During the hydrothermal processing the resultant hydroxylated and eroded surface of ZnO NR becomes favorable for the CuO nanostructures growth via oriented attachments. Heterojunction p-n diodes fabricated from the CuO/ZnO nanocorals (NC) reveal stable and high re...
Heterogeneous catalysis often involves charge transfer from catalyst surface to adsorbed molecules, whose activity thus depends on the surface charge density of catalysts. Here, we demonstrate a unique solution-phase approach to achieve controllable interfacial lengths in oxide-metal hybrid structures. Resulting from their different work functions, surface polarization is induced by the Ag-CuO ...
The Hamiltonian and trial function in the BCS theory are improved to test the limit of this theory. The Cooper pairs arise from standing electron waves, ready to move with atoms, giving high T c. The Hamiltonian is derived from alternating layers of light and heavy atoms, giving a forbidden zone hosting no standing wave pairs. The exchange term may force singlet pairs into this zone, leaving tr...
Highly sensitive hydrogen sulfide (H2S) gas sensors were developed from CuO-decorated ZnO semiconducting hierarchical nanostructures. The ZnO hierarchical nanostructure was fabricated by an electrospinning method following hydrothermal and heat treatment. CuO decoration of ZnO hierarchical structures was carried out by a wet method. The H2S gas-sensing properties were examined at different work...
Here we report a very simple method to convert conventional CuO powders to nanoparticle interlinked microsphere cages by solution method. CuO is dissolved into aqueous ammonia, and the solution is diluted by alcohol and dip coating onto a glass substrate. Drying at 80 C, the nanostructures with bunchy nanoparticles of Cu(OH)2 can be formed. After the substrate immerges into the solution and we ...
Surfactant-free Synthesis of CuO with Controllable Morphologies and Enhanced Photocatalytic Property
A green synthesis for nanoleave, nanosheet, spindle-like, rugby-like, dandelion-like and flower-like CuO nanostructures (from 2D to 3D) is successfully achieved through simply hydrothermal synthetic method without the assistance of surfactant. The morphology of CuO nanostructures can be easily tailored by adjusting the amount of ammonia and the source of copper. By designing a time varying expe...
Increased availability of nanoparticle-based products will, inevitably, expose the environment to these materials. Engineered nanoparticles (ENPs) may thus find their way into the soil environment via wastewater, dumpsters and other anthropogenic sources; metallic oxide nanoparticles comprise one group of ENPs that could potentially be hazardous for the environment. Because the soil bacterial c...
STATEMENT OF PROBLEM Acid producing bacteria including Streptococcus mutans and lactobacilli cause tooth demineralization and lead to tooth decay. Also, oral colonization of the species of Candida has been reported in many studies that are resistant to antifungal agents. OBJECTIVES In this study, antibacterial and antifungal effects of nano-CuO were studied against some oral bacteria and yeas...
ترکیبات متعددی از مس(ii) و روی(ii) با لیگاندهای مختلفی شامل پیریدین، بای پیریدین آمین، کربوکسیلیک اسیدها, ساخارین, و 8-فنیل سولفونیل نافت-1-ایل بای فنیل فسفین در ابعاد نانو و نیز پلیمر کئوردیناسیونی از آن ها سنتز و با آنالیزهای مختلفی از قبیل x-ray کریستالوگرافی تک بلور, آنالیز حرارتی (tga/dta)، پراش اشعه ی ایکس پودری (xrdp)، و میکروسکوپ الکترونی روبشی (sem) روی تمام نمونه ها شناسایی شدند. بررس...
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