keyword
https://read.qxmd.com/read/36946890/anisotropic-heavy-metal-free-semiconductor-nanocrystals-synthesis-properties-and-applications
#1
REVIEW
Long Liu, Bing Bai, Xuyong Yang, Zuliang Du, Guohua Jia
Heavy-metal (Cd, Hg, and Pb)-containing semiconductor nanocrystals (NCs) have been explored widely due to their unique optical and electrical properties. However, the toxicity risks of heavy metals can be a drawback of heavy-metal-containing NCs in some applications. Anisotropic heavy-metal-free semiconductor NCs are desirable replacements and can be realized following the establishment of anisotropic growth mechanisms. These anisotropic heavy-metal-free semiconductor NCs can possess lower toxicity risks, while still exhibiting unique optical and electrical properties originating from both the morphological and compositional anisotropy...
April 12, 2023: Chemical Reviews
https://read.qxmd.com/read/35479246/rapid-facile-synthesis-of-insb-twinning-superlattice-nanowires-with-a-high-frequency-photoconductivity-response
#2
JOURNAL ARTICLE
Yinyin Qian, Kaijia Xu, Lanjun Cheng, Cunxin Li, Xingchen Wang
We present a self-seeded (with indium droplets) solution-liquid-solid (SLS) synthesis route for InSb nanowires (NWs) using commercially available precursors at a relatively low temperature of about 175 °C, which takes only 1 min upon the injection of reductant. Structural characterization reveals that the InSb nanowires are high quality and have twinning superlattice structures with periodically spaced twin planes along the growth direction of 〈111〉. Notably, we have measured an ultrafast conductivity lifetime in the NWs of just 9...
May 27, 2021: RSC Advances
https://read.qxmd.com/read/33950682/laser-driven-growth-of-semiconductor-nanowires-from-colloidal-nanocrystals
#3
JOURNAL ARTICLE
Elena P Pandres, Matthew J Crane, E James Davis, Peter J Pauzauskie, Vincent C Holmberg
Semiconductor nanowire production through vapor- and solution-based processes has propelled nanowire systems toward a wide range of technological applications. Although vapor-based nanowire syntheses enable precise control over nanowire composition and phase, they typically employ batch processes with specialized pressure management systems, limiting throughput. Solution-based nanowire growth processes have improved scalability but can require even more extensive pressure and temperature management systems...
May 25, 2021: ACS Nano
https://read.qxmd.com/read/33494599/fe-ion-catalyzed-synthesis-of-cdse-cu-core-shell-nanowires
#4
JOURNAL ARTICLE
Mao Chen, Lekai Xu, Jiao Wang, Baokun Liu, Kun Wang, Qi Qi, Yaqiong Zhu, Xin Yang, Wencui Chai, Peixu Yang, Weidong Zhang, Jinhui Liu, Guanwei Jia, Shaojun Zhang, Jiang Du
CdSe/Cu core/shell nanowires (NWs) are successfully synthesized by a wet chemical method for the first time. By utilizing the solution-liquid-solid (SLS) mechanism, CdSe NWs are fabricated by Bi seeds, which act as catalysts. In the subsequent radial overcoating of the Cu shell on the CdSe NWs, Fe ions have been proven to be an indispensable and efficient catalyzer. The thickness of the Cu shell could be well controlled in the range of 3 to 6 nm by varying the growth temperature (from 300 to 360 °C). Our synthetic strategy pioneers a new possibility for the controlled synthesis of semiconductor-metal heterostructure NWs (especially for II-VI semiconductors), such as CdS/Cu, ZnS/Au, and ZnO/Ag, which had broad application prospects in photoconductors, thin-film transistors, and light-emitting diodes...
January 25, 2021: Inorganic Chemistry
https://read.qxmd.com/read/32670762/solution-liquid-solid-growth-and-catalytic-applications-of-silica-nanorod-arrays
#5
JOURNAL ARTICLE
Yaosi Fang, Kangxiao Lv, Zhao Li, Ning Kong, Shenghua Wang, Ao-Bo Xu, Zhiyi Wu, Fengluan Jiang, Chaoran Li, Geoffrey A Ozin, Le He
As an analogue to the vapor-liquid-solid process, the solution-liquid-solid (SLS) method offers a mild solution-phase route to colloidal 1D nanostructures with controlled sizes, compositions, and properties. However, direct growth of 1D nanostructure arrays through SLS processes remains in its infancy. Herein, this study shows that SLS processes are also suitable for the growth of nanorod arrays on the substrate. As a proof of concept, seedless growth of silica nanorod arrays on a variety of hydrophilic substrates such as pristine and oxide-modified glass, metal sheets, Si wafers, and biaxially oriented polypropylene film are demonstrated...
July 2020: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/32538420/synthesis-of-cube-rod-tube-triblock-asymmetric-nanostructures-for-enhanced-heterogeneous-catalysis
#6
JOURNAL ARTICLE
Wenli Hu, Chao Liu, Jing Wang, Congcong Pei, Ye Zhang, Chaoqi Zhang, Yang Liu, Yongkui Shan, Chengzhong Yu
A triblock asymmetric nanostructure composed of a core-shell Fe2O3@SiO2 cube as the head, SiO2 rod as the body and SiO2 tube as the tail is fabricated via a sequential growth process combining solution-liquid-solid and droplet soft templating mechanisms, which can be used as a nano stir bar with accelerated catalytic performance.
June 15, 2020: Chemical Communications: Chem Comm
https://read.qxmd.com/read/31547484/review-on-quasi-one-dimensional-cdse-nanomaterials-synthesis-and-application-in-photodetectors
#7
REVIEW
Weifeng Jin, Luodan Hu
During the past 15 years, quasi one-dimensional (1D) Cadmium Selenide (CdSe) nanomaterials have been widely investigated for high-performance electronic and optoelectronic devices, due to the unique geometrical and physical properties. In this review, recent advancements on diverse synthesis methods of 1D CdSe nanomaterials and the application in photodetectors have been illustrated in detail. First, several bottom-up synthesis methods of 1D CdSe nanomaterials have been introduced, including the vapor-liquid-solid method, the solution-liquid-solid method, and electrochemical deposition, etc...
September 23, 2019: Nanomaterials
https://read.qxmd.com/read/31063615/heavy-metal-free-colloidal-semiconductor-nanorods-recent-advances-and-future-perspectives
#8
REVIEW
Guohua Jia, Yingping Pang, Jiajia Ning, Uri Banin, Botao Ji
Quasi-1D colloidal semiconductor nanorods (NRs) are at the forefront of nanoparticle (NP) research owing to their intriguing size-dependent and shape-dependent optical and electronic properties. The past decade has witnessed significant advances in both fundamental understanding of the growth mechanisms and applications of these stimulating materials. Herein, the state-of-the-art of colloidal semiconductor NRs is reviewed, with special emphasis on heavy-metal-free materials. The main growth mechanisms of heavy-metal-free colloidal semiconductor NRs are first elaborated, including anisotropic-controlled growth, oriented attachment, solution-liquid-solid method, and cation exchange...
May 7, 2019: Advanced Materials
https://read.qxmd.com/read/30525546/catalyst-assisted-solution-liquid-solid-synthesis-of-cds-cuinse-2-and-cuinte-2-cuinse-2-nanorod-heterostructures
#9
JOURNAL ARTICLE
Guanwei Jia, Jiang Du
Axial nanowire heterostructures composed of cadmium sulfide (CdS)/copper indium diselenide (CuInSe2 ) and copper indium telluride (CuInTe2 )/copper indium diselenide (CuInSe2 ) were synthesized by a solution-liquid-solid (SLS) method with the catalyzer of bismuth nanocrystals. Electron microscopy and diffraction studies show CuInTe2 and CuInSe2 segments growing along the [112] direction with a clear epitaxial interface between them. In CdS/CuInSe2 nanorod heterostructures, CuInSe2 and CdS segments grow along the [112] and [111] direction, respectively, with an obvious epitaxial interface between them...
December 7, 2018: Inorganic Chemistry
https://read.qxmd.com/read/30411876/solution-liquid-solid-growth-of-cuinte-2-and-cuinse-x-te-2-x-semiconductor-nanowires
#10
JOURNAL ARTICLE
Guanwei Jia, Jiang Du
Ternary CuInTe2 and quaternary CuInSe x Te2- x nanowires were successfully synthesized for the first time by a solution-liquid-solid (SLS) mechanism. Crystalline, straight, and nearly stoichiometric CuInTe2 and CuInSe x Te2- x nanowires were readily achieved by using the molecular precursors and in the presence of molten Bi nanoparticles and coordinating capping ligands. The temperature and reactant order-of-addition of this reaction strongly affected the composition of the reaction product and the morphology obtained...
December 3, 2018: Inorganic Chemistry
https://read.qxmd.com/read/29182853/role-of-precursor-conversion-chemistry-in-the-crystal-phase-control-of-catalytically-grown-colloidal-semiconductor-quantum-wires
#11
JOURNAL ARTICLE
Fudong Wang, William E Buhro
Crystal-phase control is one of the most challenging problems in nanowire growth. We demonstrate that, in the solution-phase catalyzed growth of colloidal cadmium telluride (CdTe) quantum wires (QWs), the crystal phase can be controlled by manipulating the reaction chemistry of the Cd precursors and tri-n-octylphosphine telluride (TOPTe) to favor the production of either a CdTe solute or Te, which consequently determines the composition and (liquid or solid) state of the Bix Cdy Tez catalyst nanoparticles. Growth of single-phase (e...
December 26, 2017: ACS Nano
https://read.qxmd.com/read/29115841/straight-indium-antimonide-nanowires-with-twinning-superlattices-via-a-solution-route
#12
JOURNAL ARTICLE
Yinyin Qian, Qing Yang
Indium antimonide (InSb) enables diverse applications in electronics and optoelectronics. However, to date, there has not been a report on the synthesis of InSb nanowires (NWs) via a solution-phase strategy. Here, we demonstrate for the first time the preparation of high-quality InSb NWs with twinning superlattices from a mild solution-phase synthetic environment from the reaction of commercial triphenylantimony with tris(2,4-pentanedionato)-indium(III). This reaction occurs at low temperatures from 165 to 195 °C (optimized at ∼180 °C), which is the lowest temperature reported for the growth of InSb NWs to date...
December 13, 2017: Nano Letters
https://read.qxmd.com/read/29052673/ternary-hybrid-nanostructures-of-au-cds-zno-grown-via-a-solution-liquid-solid-route-using-au-zno-catalysts
#13
JOURNAL ARTICLE
Kobi Flomin, Mahmud Diab, Taleb Mokari
Multi-component nanostructures of Au-CdS-ZnO with a novel morphology were synthesized by a non-conventional strategy where seeded growth is combined with solution-liquid-solid (SLS) growth. Each of these synthetic routes is used for growing a different domain of the final heterostructure, where ZnO rods are grown first on Au nanoparticles via heterogeneous nucleation while CdS is later grown between these two domains via SLS, using the Au tip of the preformed Au-ZnO as a catalyst. The in situ alloying of the Au tip with Cd enabled the metal tip to function as an SLS catalyst at a relatively mild reaction temperature which is lower than the melting point of pure Au...
November 2, 2017: Nanoscale
https://read.qxmd.com/read/27762558/engineered-solution-liquid-solid-growth-of-a-treelike-1d-1d-tio-2-nanotube-cdse-nanowire-heterostructure-photoelectrochemical-conversion-of-broad-spectrum-of-solar-energy
#14
JOURNAL ARTICLE
Bratindranath Mukherjee, Swagotom Sarker, Eric Crone, Pawan Pathak, Vaidyanathan R Subramanian
This work presents a hitherto unreported approach to assemble a 1D oxide-1D chalcogenide heterostructured photoactive film. As a representative system, bismuth (Bi) catalyzed 1D CdSe nanowires are directly grown on anodized 1D TiO2 nanotube (T_NT). A combination of the reductive successive-ionic-layer-adsorption-reaction (R-SILAR) and the solution-liquid-solid (S-L-S) approach is implemented to fabricate this heterostructured assembly, reported in this 1D/1D form for the first time. XRD, SEM, HRTEM, and elemental mapping are performed to systematically characterize the deposition of bismuth on T_NT and the growth of CdSe nanowires leading to the evolution of the 1D/1D heterostructure...
December 7, 2016: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/27136513/selective-extraction-of-gardenia-yellow-and-geniposide-from-gardenia-jasminoides-by-mechanochemistry
#15
JOURNAL ARTICLE
Wenhao Xu, Jingbo Yu, Wen Feng, Weike Su
A novel method for the selective extraction of gardenia yellow and geniposide from Gardenia Jasminoides, based on a mechanochemical method is described. Without the need of complex separation techniques, gardenia yellow compliant with the national standard could be extracted in a simple fashion. The optimal ball-milling conditions determined were as follows: 30% g/g. active carbon milling at 200 rpm in a planetary mill for 5 min. The extraction conditions of the milled mixtures were as follows: the milled mixtures were extracted with water (liquid-solid ratio 10:1) at 20 °C for 5 min with yields 85% of total geniposide, followed by extraction with 80% ethanol solution (liquid-solid ratio 5:1) and 1% g/g...
April 28, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/26974736/solution-liquid-solid-synthesis-properties-and-applications-of-one-dimensional-colloidal-semiconductor-nanorods-and-nanowires
#16
JOURNAL ARTICLE
Fudong Wang, Angang Dong, William E Buhro
The solution-liquid-solid (SLS) and related solution-based methods for the synthesis of semiconductor nanowires and nanorods are reviewed. Since its discovery in 1995, the SLS mechanism and its close variants have provided a nearly general strategy for the growth of pseudo-one-dimensional nanocrystals. The various metallic-catalyst nanoparticles employed are summarized, as are the syntheses of III-V, II-VI, IV-VI, group IV, ternary, and other nanorods and nanowires. The formation of axial heterojunctions, core/shell nanowires, and doping are also described...
September 28, 2016: Chemical Reviews
https://read.qxmd.com/read/26530669/solution-based-synthesis-and-purification-of-zinc-tin-phosphide-nanowires
#17
JOURNAL ARTICLE
Erik J Sheets, Robert B Balow, Wei-Chang Yang, Eric A Stach, Rakesh Agrawal
The solution-based synthesis of nanoscale earth-abundant semiconductors has the potential to unlock simple, scalable, and tunable material processes which currently constrain development of novel compounds for alternative energy devices. One such promising semiconductor is zinc tin phosphide (ZnSnP2). We report the synthesis of ZnSnP2 nanowires via a solution-liquid-solid mechanism utilizing metallic zinc and tin in decomposing trioctylphosphine (TOP). Dried films of the reaction product are purified of binary phosphide phases by annealing at 345 °C...
December 7, 2015: Nanoscale
https://read.qxmd.com/read/26525301/cu2-s-zns-heterostructured-nanorods-cation-exchange-vs-solution-liquid-solid-like-growth
#18
JOURNAL ARTICLE
You Zhai, Moonsub Shim
Cu2 S/ZnS heterostructured nanorods (HNRs) with uncommon morphologies are achieved through single-pot and multi-batch synthetic strategies. In both cases, Cu2 S NRs form first, which then undergo partial cation exchange and solution-liquid-solid (SLS)-like growth catalyzed by the remaining Cu2 S parts of the NRs. The location and the volume of ZnS achieved through partial cation exchange control the size of the Cu2 S catalysts, which in turn determine whether tapered rod-rod, body/tail, or barbell-like structure results from subsequent SLS-like growth...
March 3, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://read.qxmd.com/read/26387202/-preparation-and-chromatographic-performance-of-a-eugenol-bonded-silica-gel-stationary-phase-for-high-performance-liquid-chromatography
#19
JOURNAL ARTICLE
Lili Xu, Minghua Zhong, Xiaojing Chen
A eugenol-bonded silica gel stationary phase (EGSP) for high performance liquid chromatography ( HPLC) has been synthesized by the solid-liquid successive reaction method. The preparation process included two steps: firstly, γ-glycidoxypropyltrimethoxy-silane (KH-560) was covalently attached to the surface of spherical silica gel. Then the bonded silica gel continued to react with eugenol ligand, which was a plant active component, and obtained EGSP. The structure of EGSP was characterized by elemental analysis, thermogravimetric analysis and Fourier transform infrared spectroscopy...
May 2015: Se Pu, Chinese Journal of Chromatography
https://read.qxmd.com/read/26383888/cubic-klu3f10-nanocrystals-mn-2-dopant-controlled-synthesis-and-upconversion-luminescence
#20
JOURNAL ARTICLE
Xia Xu, Zhuo Wang, Pengpeng Lei, Xiuling Liu, Yue Su, Lile Dong, Shuang Yao, Liang Zhou, Shuyan Song, Jing Feng, Hongjie Zhang
Cubic KLu3F10 nanocrystals have been fabricated by doping Mn(2+) ions via a liquid-solid solution (LSS) hydrothermal method. With an increase in the Mn(2+) level, a phase transformation from orthorhombic KLu2F7 to cubic KLu3F10 associated with evolution of the particle morphologies and sizes is evident. The phase transformation mechanism based on doping with Mn(2+) ions was studied via a series of time-controlled experiments and the enhancement of the intensity of upconversion luminescence (UCL) via doping with Mn(2+) ions is discussed in detail...
October 21, 2015: Dalton Transactions: An International Journal of Inorganic Chemistry
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