المؤلفون: Shu-Chen Lu, Hsing-Yu Tuan, Kuan-Ting Chen, Wei-Chung Chang, Po-Yuan Yang

المصدر: Journal of Nanomaterials, Vol 2019 (2019)

مصطلحات موضوعية: Colloid, Crystallography, Morphology (linguistics), Materials science, Article Subject, Nanocrystal, Octahedron, lcsh:Technology (General), lcsh:T1-995, Nanoparticle, General Materials Science

الوصف: Growth of Cu polyhedral structures with well-defined and controllable shapes faced tremendous synthetic challenges in colloid nanocrystal synthesis in the past few decades. In this article, we report a facile approach for the synthesis of Cu nanocrystals with systematic morphological evolution. Transitional truncated octahedral, edge- and corner-truncated octahedral, all-corner-truncated octahedral, and octahedral structures were obtained in a solution-based reduction reaction by precise tuning reaction time. Four distinct morphologies of nanocrystals have been characterized by SEM technique. The optical properties of these various morphologies of nanocrystals were also investigated, and it indicates that the SPR band shifts red while the shape of nanoparticles evolves from transitional truncated octahedral to octahedral, whose resonant bands are transferred from 590 nm to 620 nm.

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الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ae076c4b6685aeba4704ae6db51b6adTest
https://doi.org/10.1155/2019/2890162Test

المؤلفون: Wei-Chung Chang, Hsing-Yu Tuan, Kuan-Ting Chen, Jen-Hsuan Wu

المصدر: Advanced Science

مصطلحات موضوعية: Battery (electricity), red phosphorus, Materials science, General Chemical Engineering, Potassium, General Physics and Astronomy, Medicine (miscellaneous), chemistry.chemical_element, 02 engineering and technology, Manganese, Carbon nanotube, 010402 general chemistry, Electrochemistry, 01 natural sciences, Biochemistry, Genetics and Molecular Biology (miscellaneous), law.invention, P—C bonding, law, General Materials Science, PIB anodes, Communication, General Engineering, wet‐ball milling process, 021001 nanoscience & nanotechnology, Communications, Cathode, 0104 chemical sciences, Anode, chemistry, Chemical engineering, Electrode, 0210 nano-technology

الوصف: Phosphorus (P) possesses the highest theoretical specific capacity (865 mA h g−1) among all the elements for potassium‐ion battery (PIB) anodes. Although Red P (RP) has intrinsic advantages over its allotropes, including low cost and nontoxicity, and simpler preparation, it is yet unknown to effectively activate it into a high‐performance PIB anode. Here, high‐performance RP PIB anodes are reported. Two important factors are found to facilitate RP react with K‐ions reversibly: i) nanoscale RP particles are dispersed evenly in a conductive carbon matrix composed of multiwall carbon nanotubes and Ketjen black that provide an efficient electrical pathway and a tough scaffold. ii) The results of X‐ray photoelectron spectroscopy spectrum and the electrochemical performance perhaps show that no P—C bond formation is beneficial to allow K‐ions to react with RP effectively. As a result, the RP/C electrodes deliver a reversible specific capacity of ≈750 mA h g−1 and exhibit a high‐rate capability (≈300 mA h g−1 at 1000 mA g−1). RP/C full cells using potassium manganese hexacyanoferrate as cathode show a long cycling life (680 cycles) at a current density of 1000 mA g−1, in addition, a pouch‐type battery is built to demonstrate practical applications.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3cf4de7bf003567afc7657809e8c210Test
https://doi.org/10.1002/advs.201801354Test

المؤلفون: Hwen-Fen Hong, Yi-Kai Lin, Yu-Lun Chueh, Hsing-Yu Tuan, Yu Ting Yen, Shu-Hao Chang

المصدر: Nanoscale Research Letters

مصطلحات موضوعية: Materials science, Nano Express, business.industry, Photovoltaic system, Nanochemistry, Nanotechnology, Heterojunction, Nanocrystal, Hybrid solar cell, Quantum dot solar cell, Condensed Matter Physics, Copper indium gallium selenide solar cells, Active layer, Cu(In,Ga)Se2, Materials Science(all), Poly(3-hexylthiophene), Optoelectronics, General Materials Science, Thin film, business

الوصف: This work presents the systematic studies of bulk hybrid heterojunction solar cells based on Cu(In, Ga)Se2 (CIGS) nanocrystals (NCs) embedded in poly(3-hexylthiophene) matrix. The CIGS NCs of approximately 17 nm in diameter were homogeneously blended with P3HT layer to form an active layer of a photovoltaic device. The blend ratios of CIGS NCs to P3HT, solvent effects on thin film morphologies, interface between P3HT/CIGS NCs and post-production annealing of devices were investigated, and the best performance of photovoltaic devices was measured under AM 1.5 simulated solar illumination (100 mW/cm2).

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::975b658c651d16185405ba0e1017ca4bTest
https://doi.org/10.1186/1556-276x-8-329Test