Formation and Function of Bismuth Nanocatalysts for the Solution–Liquid–Solid Synthesis of CdSe Nanowires

Li, Zhen; Kornowski, Andreas; Myalitsin, Anton; Mews, Alf

doi:10.1002/smll.200800858

Cited by 67 publications

(97 citation statements)

References 30 publications

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“…We showed that the Bi nanocatalysts grow into large nanoparticles (40-80 nm) upon heating. [43] Also we were able to show that the growth of the Bi nanoparticles could be slowed down in the presence of Cd and Se precursors upon formation of the CdSe nanowires. [43] In summary, the growth mechanism of CdSe nanowires by the SLS method is even more complex than the kinetic reaction control to form different CdSe nanostructures, due to the additional presence of the catalytic nanodroplets.…”

Section: Introductionmentioning

confidence: 66%

“…In our previous study, we developed a simple way to prepare pure Bi nanoparticles (D ¼ 3.3 AE 0.5 nm) by the reduction of Bi[N(SiMe 3 ) 2 ] 3 or BiCl 3 with TOP at room temperature. [43] These nanocatalysts can also be in situ produced by mixing the Bi precursors and TOPSe solution (the Se concentration is 1 or 2 M) without additional TOP. We showed that the Bi nanocatalysts grow into large nanoparticles (40-80 nm) upon heating.…”

Section: Introductionmentioning

confidence: 99%

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Controlled Synthesis of CdSe Nanowires by Solution–Liquid–Solid Method

Kurtuluş

et al. 2009

Adv Funct Materials

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116

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Semiconductor nanowires prepared by wet chemical methods are a relatively new field of 1D electronic systems, where the dimensions can be controlled by changing the reaction parameters using solution chemistry. Here, the solution–liquid–solid approach where the nanowire growth is governed by low‐melting‐point catalyst particles, such as Bi nanocrystals, is presented. In particular, the focus is on the preparation and characterization of CdSe nanowires, a material which serves a prototype structure for many kinds of low dimensional semiconductor systems. To investigate the influence of different reaction parameters on the structural and optical properties of the nanowires, a comprehensive synthetic study is presented, and the results are compared with those reported in literature. How the interplay between different reaction parameters affects the diameter, length, crystal structure, and the optical properties of the resultant nanowires are demonstrated. The structural properties are mainly determined by competing reaction pathways, such as the growth of Bi nanocatalysts, the formation and catalytic growth of nanowires, and the formation and uncatalytic growth of quantum dots. Systematic variation of the reaction parameters (e.g., molecular precursors, concentration and concentration ratios, organic ligands, or reaction time, and temperature) enables control of the nanowire diameter from 6 to 33 nm, while their length can be adjusted between several tens of nanometers and tens of micrometers. The obtained CdSe nanowires exhibit an admixture of wurtzite (W) and zinc blende (ZB) structure, which is investigated by X‐ray diffraction. The diameter‐dependent band gaps of these nanowires can be varied between 650 and 700 nm while their fluorescence intensities are mainly governed by the Cd/Se precursor ratio and the ligands used.

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Section: Introductionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of CdSe Nanowires by Solution–Liquid–Solid Method

Kurtuluş

et al. 2009

Adv Funct Materials

Self Cite

116

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“…The release of heat could influence the crystallinity of the ultra-small nanoparticles because the melting point of nanoparticles is strongly dependent on particle size. [66] Hence the small Bi2Se3 nanoparticles could form amorphous structure.…”

Section: Resultsmentioning

confidence: 99%

Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures

Han

et al. 2015

Nano Energy

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, S. Xue. (2015). Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures. Nano Energy, Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures AbstractA robust low-cost ambient aqueous method for the scalable synthesis of surfactant-free nanostructured metal chalcogenides (MaXb, M=Cu, Ag, Sn, Pb, and Bi; X=S, Se, and Te; a=1 or 2; and b=1 or 3) is developed in this work. The effects of reaction parameters, such as precursor concentration, ratio of precursors, and amount of reducing agent, on the composition, size, and shape of the resultant nanostructures have been comprehensively investigated. This environmentally friendly approach is capable of producing metal chalcogenide nanostructures in a one-pot reaction on a large scale, which were investigated for their thermoelectric properties towards conversion of waste heat into electricity. The results demonstrate that the thermoelectric properties of these metal chalcogenide nanostructures are strongly dependent on the types of metal chalcogenides, and their figure of merits are comparable with previously reported figures for their bulk or nanostructured counterparts.

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“…They nucleate and take a role as catalyst for the crystal growth of CdSe NWs ( Figure 1(b)). Compared to Bi nanocrystal synthesized by chemical methods, 8,23 the Bi thin film makes reaction system simple due to removing the number of cases originated from Bi precursor.…”

Section: Resultsmentioning

confidence: 99%

Effect of Tributylphosphine for the Solution-Liquid-Solid Synthesis of CdSe Nanowires

Jang¹,

Lee²

2013

Bulletin of the Korean Chemical Society

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Semiconductor CdSe nanowires (NWs) can serve as model systems for investigating the physical properties of one-dimensional (1D) nanostructures and have great potential for applications in electronics and photonic nanodevices. With numerous attractions arisen from their physical properties, CdSe NWs have been synthesized by vapor-liquid-solid (VLS) methods, but they have some limitations of high reaction temperature and low production. Here, we synthesized CdSe NWs via the solution-liquid-solid (SLS) mechanisms using bismuth (Bi) covered substrates as a low-melting point catalyst and compared the products after injecting identical amount of Se and different amount of tributylphosphine (TBP). CdSe NWs have similar diameters but longer lengths with decreasing TBP, so we proposed the role of TBP as a solvent and capping agent of Se.

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Formation and Function of Bismuth Nanocatalysts for the Solution–Liquid–Solid Synthesis of CdSe Nanowires

Cited by 67 publications

References 30 publications

Controlled Synthesis of CdSe Nanowires by Solution–Liquid–Solid Method

Controlled Synthesis of CdSe Nanowires by Solution–Liquid–Solid Method

Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures

Effect of Tributylphosphine for the Solution-Liquid-Solid Synthesis of CdSe Nanowires

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