Wet synthesis of nearly monodisperse CdSe nanoparticles at room temperature

Yang, Yingzhen; Xiang, Bao Jian

doi:10.1016/j.jcrysgro.2005.07.038

Cited by 52 publications

(21 citation statements)

References 24 publications

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“…A similar observation has also been reported by Ma and co-workers (Ma et al, 2002b). Using selenosulphate, Yang and Xiang (2005) also reported the synthesis of PVP-capped CdSe nanoparticles. However, the reaction takes place in the presence of thioglycerol which acts as both complexant and catalyst for the decomposition of selenosulphate.…”

Section: Pva and Pvp-capped Mse Nanoparticlessupporting

confidence: 84%

“…The sharp diffraction at 1:1 molar ratio was attributed to the selfassembly of the dot particles as indicated by the different arrangement pattern. Generally in thermodynamic terms, it is notable that cubic zinc -blende is the most stable form at lower temperatures (Li et al, 2007;Ma et al, 2002aMa et al, , 2000bYang & Xiang, 2005), while wurtzite is more stable at high temperatures (Murray et al, 1993;Trindade & O'Brien, 1996, 1997Malik et al, 2001). In the present study, hexagonal wurtzite phase was obtained at room temperature.…”

Section: Structural Analysismentioning

confidence: 99%

“…Apart from those that utilized highly toxic H 2 Se (Trindade et al, 2001) or N, Ndimethylselenourea (Rogach et al, 2000) as selenium source, the solution reaction growth techniques appear to be the cheapest and most convenient approaches (Wang et al, 1999;Li et al, 2007;Ma et al, 2002aMa et al, , 2002bYang and Xiang, 2005). However in solution, bare nanoparticles are thermodynamically unstable and always tend to aggregate, losing their peculiar properties.…”

Section: Introductionmentioning

confidence: 99%

“…Ma and co-workers also reported a series of polyvinyl alcohol (PVA)-selenide nanocomposites via a one step solution growth technique at room temperature and ambient pressure (Ma et al, 2002a(Ma et al, , 2002b. Though this technique is simple and its flexibility allows the use of different passivating agents such as starch, PVA, polyvinyl pyrolindone (PVP) (Yang and Xiang, 2005) and tartaric acid (Behboudnia and Azizianekalandaragh, 2007), the preparation of sodium selenosulphate used as the selenide source requires a longer reaction time and must be stored in the dark at 60 o C due to its instability at room temperature. Recently we have reported a facile, safe and inexpensive synthesis of nearly monodispersed organically soluble CdSe nanoparticles using selenide ion produced via reduction of selenium powder in water as the selenium source , 2009.…”

Section: Introductionmentioning

confidence: 99%

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A Facile One-Pot Synthesis of MSe (M = Cd or Zn) Nanoparticles Using Biopolymer as Passivating Agent

Oluwafemi¹,

Songca²

2012

Products and Applications of Biopolymers

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Section: Pva and Pvp-capped Mse Nanoparticlessupporting

confidence: 84%

Section: Structural Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Facile One-Pot Synthesis of MSe (M = Cd or Zn) Nanoparticles Using Biopolymer as Passivating Agent

Oluwafemi¹,

Songca²

2012

Products and Applications of Biopolymers

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“…35,36 Na 2 SeSO 3 was prepared by the method reported by Bhuse et al and used immediately. 37 As the penicillamine stabilising ligand is chiral it was used in both its enantiomeric forms, as well as the racemate.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and spectroscopic studies of chiral CdSe quantum dots

et al. 2010

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Using microwave irradiation, water soluble, optically active, penicillamine (Pen) capped CdSe nanocrystals with broad spectral distribution (430-780 nm) of photoluminescence have been produced and studied by a range of instrumental techniques including absorption, circular dichroism and both steady state and time resolved photoluminescence spectroscopy. The photoluminescence of these nanocrystals is attributed to emission from surface defect states. The decay of the excited state in the nanosecond region, which can be analysed as a triple exponential, depends strongly on the emission wavelength selected, but only weakly on the excitation wavelength. Graphical Abstract: IntroductionChirality is a common occurrence in the natural world and chiraln compounds are very important in chemistry, biology, pharmacology and medicine. It has also been envisaged that chirality could play an important role in nanotechnology. 1,2 The majority of existing research in this field has been focused on chiral organic, metallorganic and biological molecules and their supramolecular structures, 3 while research in the area of chiral inorganic nanoparticles is still in the very early stage of its development. For example, there has been some work involving chiral optically active metallic gold 4,5 and silver 6,7 nanoparticles, as well as carbon nanotubes. 8,9 However, there are currently only a few recent papers dealing with chiral light emitting semiconducting nanocrystals (quantum dots). [10][11][12][13][14] In general over the last decade much attention has been directed towards II-VI type CdS, CdTe and CdSe quantum dots (QDs). [15][16][17][18][19] It is the ability to fine-tune their optical properties by chemical control of their size and shape (i.e. their degree of quantum confinement) which makes quantum dots particularly interesting. This level of optical control combined with QDs' resistance to photobleaching and their high level of solubility in practically any solvent (depending on the stabiliser used) make these nanomaterials potentially suited for roles as divergent as light emitting diodes, 20 biological sensors 21 and photovoltaic devices. [22][23][24] Thiol group containing amino acids have proved to be excellent stabilisers, with L-cysteine becoming one of the popular surface capping molecules for CdX (X ¼ S, Se, and Te) nanoparticles. 18,[25][26][27][28][29][30][31] In addition this use of stereospecific chiral stabilising molecules opened another avenue of interest in the area of quantum dot research, as chirality is a key factor in biological and biochemical interactions. Due to their unique photophysical properties, we believe that chiral QDs have a range of potential applications in photonics and biochemistry. 13,32,33 The main aim of our work is to develop novel chiral CdSe based QDs by using chiral stabilisers and to investigate the properties of these materials. Here we report the synthesis and detailed spectroscopic studies of new penicillamine stabilised CdSe QDs, which have been prepared using the dextrorota...

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Size-Selective Synthesis of Ultrasmall Hydrophilic CdSe Nanoparticles in Aqueous Solution at Room Temperature

Park

Okamoto

Kaji

et al. 2012

Methods in Molecular Biology

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Hydrophilic semiconductor nanoparticles are very attractive for various biological applications, such as in optical sensing, tracing, and imaging of biological molecules-of-interest, because of their broad excitation wavelength, tunable emission wavelength, strong photoluminescence, and relatively high stability against photobleaching and chemicals. Compared to organic phase synthesis and subsequent surface modification, aqueous phase synthesis approaches provide multiple advantages for obtaining hydrophilic semiconductor nanoparticles. Here, we describe methods for the size-selective growth and stabilization of ultrasmall hydrophilic CdSe nanoparticles in aqueous solution at room temperature by using amino acid cysteine or one of its derivatives as a surface capping agent.

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Wet synthesis of nearly monodisperse CdSe nanoparticles at room temperature

Cited by 52 publications

References 24 publications

A Facile One-Pot Synthesis of MSe (M = Cd or Zn) Nanoparticles Using Biopolymer as Passivating Agent

A Facile One-Pot Synthesis of MSe (M = Cd or Zn) Nanoparticles Using Biopolymer as Passivating Agent

Synthesis and spectroscopic studies of chiral CdSe quantum dots

Size-Selective Synthesis of Ultrasmall Hydrophilic CdSe Nanoparticles in Aqueous Solution at Room Temperature

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