Structural and optical property studies of CdSe crystalline nanorods synthesized by a solvothermal method

Ramalingam, G.; Melikechi, Noureddine; Christy, P. Dennis; Selvakumar, S.; Sagayaraj, P.

doi:10.1016/j.jcrysgro.2009.03.017

Cited by 33 publications

(16 citation statements)

References 24 publications

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“…Crystalline planes are clearly visible and measurable and correspond to a period of 0.325 nm, which is consistent with the zincblende phase of the material. Indeed, CdSe can be found in the cubic zincblende phase [ 35 ] or in the hexagonal wurzite phase, with larger lattice period [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Dendrimer-Capped Nanoparticles Prepared by Picosecond Laser Ablation in Liquid Environment

et al. 2009

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Fifth generation ethylendiamine-core poly(amidoamine) (PAMAM G5) is presented as an efficient capping agent for the preparation of metal and semiconductor nanoparticles by ps laser ablation in water. In particular, we describe results obtained with the fundamental, second and third harmonic of a ps Nd:YAG laser and the influence of laser wavelength and pulse energy on gold particle production and subsequent photofragmentation. In this framework, the role of the dendrimer and, in particular, its interactions with gold clusters and cations are accounted.

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Section: Resultsmentioning

confidence: 99%

Dendrimer-Capped Nanoparticles Prepared by Picosecond Laser Ablation in Liquid Environment

et al. 2009

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“…The synthesis process follows the usual solvothermal route similar to the process described in the literature. 17,18 All the powders were prepared at 180°C furnace temperature for 5 h reaction time. For each of the binary (ZnS and ZnSe) and ternary alloy films (with x = 0.41, 0.51 and 0.91), the respective evaporation sources, i.e., ZnS and ZnSe powders and ZnS-ZnSe composite powders, were synthesized using different molar ratios of the anion salts to vary the relative concentrations of Se and S atoms in the alloy.…”

Section: Introductionmentioning

confidence: 99%

Studies on Spin Orbit Splitting and Dual Mode Phonon Vibrations in ZnS x Se1−x Ternary Alloys Films with Varying Se Concentration

Lalhriatzuala

Agarwal

2015

Journal of Elec Materi

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ZnS x Se 1Àx (x = 0, 0.41, 0.51, 0.91, 1) ternary alloy thin films with variable structural, optical and vibrational properties were prepared by thermal evaporation of solvothermally synthesized ZnS-ZnSe nanocomposite powders. The deposited films were uniform and have zinc-blende structure with (111) orientation. Variation of lattice parameter with composition was slightly nonlinear with a bowing parameter of 0.12 Å . Spin orbit (SO) splitting of the valence band was observed in binary ZnSe and ternary samples with large Se atomic concentration such as ZnS 0.41 Se 0.59 and ZnS 0.51 Se 0.49 . The SO splitting energy decreases as the Se atomic concentration in the alloy decreases. Two phonon modes (corresponding to ZnS and ZnSe bonds) behavior were observed in the Raman spectra of the ternary alloys. The observed phonon mode frequencies shifted with changes in Se atomic concentration in agreement with theroretical predictions. Gap mode vibration of Se in ZnS lattice was also observed at 221 cm À1 in the ternary sample with small Se atomic concentration (ZnS 0.91 Se 0.09 ), which also matches closely with theoretically calculated values.

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“…Among these, solvothermal method has been proven to be the most convenient route to fabricate CdSe nanostructures due to easy control of phase, size, and morphology . In the solvothermal process, various solvents such as a mixture of de‐ionized water and chemical solutions such as ethylendiamine , diethylamine , triethylenetetramine (TETA) , ammonia solution , oleic acid , etc. have been successfully used in the synthesis.…”

Section: Introductionmentioning

confidence: 99%

Thermal and structural studies of CdSe nanorods synthesized by solvothermal process

Zuala

Agarwal

2016

Physica Status Solidi (a)

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] are precursors used for cadmium and selenium ions, respectively. Structural parameters are obtained using Williamson-Hall plot of the X-ray diffraction data. Energy dispersive X-ray analysis measurements show that the nanorods are slightly cadmium rich and stoichiometry improves with reaction time. Field emission scanning electron microscope images show morphological changes in CdSe nanoparticle with reaction time. While particles synthesized for shorter reaction time are mostly spherical and oval shape, longer reaction time results in mostly elongated rod-shape particles. Thermal stability of the nanorods is studied using thermogravimetric analysis (TGA). All the samples have high thermal stability without significant weight loss up to about 590 8C. The kinetics of thermal decomposition studied using Coats-Redfern method shows that the decomposition follow contracting cylinder model, which assumes that nucleation occurs rapidly on the surface of the cylindrical nanoparticles. Thermodynamic parameters in the decomposition such as activation energy, change in entropy, enthalpy of activation, and Gibbs free energy are also calculated.

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Structural and optical property studies of CdSe crystalline nanorods synthesized by a solvothermal method

Cited by 33 publications

References 24 publications

Dendrimer-Capped Nanoparticles Prepared by Picosecond Laser Ablation in Liquid Environment

Dendrimer-Capped Nanoparticles Prepared by Picosecond Laser Ablation in Liquid Environment

Studies on Spin Orbit Splitting and Dual Mode Phonon Vibrations in ZnS x Se1−x Ternary Alloys Films with Varying Se Concentration

Thermal and structural studies of CdSe nanorods synthesized by solvothermal process

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