Synthesis of Monodisperse CdSe QDs Using Controlled Growth Temperatures

2011 ◽  
Vol 364 ◽  
pp. 485-488 ◽  
Author(s):  
Mohammad Hafizuddin Haji Jumali ◽  
Razinah Rahmat Noor ◽  
Muhammad Yahaya ◽  
Muhamad Mat Salleh ◽  
Akrajas Ali Umar
Keyword(s):  
Growth Temperature ◽  
Quantum Confinement ◽  
Energy Gap ◽  
Optoelectronic Devices ◽  
Growth Period ◽  
Potential Candidate ◽  
Cdse Qds ◽  
Wet Chemical Method ◽  
Increment Of Growth ◽  
Wet Chemical

This paper reports on the effect of growth temperatures on optical properties of monodisperse CdSe QDs synthesized via wet chemical method. The growth temperature was varied from 260 – 310 °C while growth period was fixed at 60 s. The resulting colloidal was in strong quantum confinement regime and having yield as high as 53%. As the growth temperature increased, the monodispersed CdSe QDs with diameter in the range of 3-7 nm were obtained. Both absorption and PL spectra of the QDs revealed a strong red-shift with the increment of growth temperature. Thus, the size of QDs was enlarged with increment of the wavelength from both the spectra. Consequently, the energy gap of resulting QDs can be tuned by tuning the size of QDs. More importantly, the narrow widths of the PL emissions with different colors make these colloidal to be a potential candidate for different optical and optoelectronic devices.

Quantum confinement of lead titanate nanocrystals by wet chemical method

2015 ◽  
Vol 649 ◽  
pp. 50-53 ◽  
Author(s):  
K. Kaviyarasu ◽  
E. Manikandan ◽  
Z.Y. Nuru ◽  
M. Maaza
Keyword(s):  
Lead Titanate ◽  
Quantum Confinement ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical

Preparation and Microstructural Properties of Gallium Doped Zinc Oxide Thin Films for Organic Solar Cells

2014 ◽  
Vol 904 ◽  
pp. 25-28
Author(s):  
C. Lan ◽  
H. Wang ◽  
Z.Y. Zhong ◽  
T. Zhang ◽  
C.Y. Yang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Growth Temperature ◽  
Organic Solar Cells ◽  
Energy Gap ◽  
X Ray Diffraction ◽  
Optical Energy Gap ◽  
Increment Of Growth ◽  
Type Crystal

Transparent conducting gallium doped zinc oxide (GaZnO) films were prepared by magnetron sputtering technique. The influence of growth temperature on the microstructural and optical properties of the films were investigated by means of X-ray diffraction (XRD), spectrophotometer and optical characterization method, respectively. The results show that all the samples are polycrystalline in nature having a hexagonal wurtzite type crystal structure with a preferred grain orientation in the (002) direction. The growth temperature significantly affects the crystal structure and optical properties of the samples. The film deposited at the growth temperature of 670 K possesses the largest grain grain, the minimum dislocation density and the lowest microstrain. The average visible transmittance and optical energy gap of the samples increase gradually with the increment of growth temperature.

scholarly journals Synthesis of Coral-Like, Straw-Tied-Like, and Flower-Like Antimony Sulfides by a Facile Wet-Chemical Method

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jutarat Kavinchan ◽  
Titipun Thongtem ◽  
Somchai Thongtem ◽  
Eksuree Saksornchai
Keyword(s):  
Electron Microscopy ◽  
Chemical Method ◽  
Energy Gap ◽  
Sodium Thiosulfate ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Antimony Chloride ◽  
Wet Chemical

Antimony sulfide (Sb2S3) was successfully synthesized from antimony chloride (SbCl3) and sodium thiosulfate pentahydrate (Na2S2O3·5H2O) in ethylene glycol (EG) without using any template by a facile wet-chemical method. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) show that the products were orthorhombic Sb2S3nanorods forming the coral-like, straw-tied-like, and flower-like architectures with the nanorods growing along the [001] direction. The energy gap (Eg) was determined by UV-visible absorption to be 1.52 eV.

scholarly journals Morphological characterization and electronic properties of pristine and oxygen-exposed graphene nanoribbons on Ag(110)

2021 ◽  
Author(s):  
Jose Eduardo Barcelon ◽  
Marco Smerieri ◽  
Giovanni Carraro ◽  
Pawel Wojciechowski ◽  
Luca Vattuone ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Quantum Confinement ◽  
Energy Gap ◽  
Graphene Nanoribbons ◽  
Morphological Characterization

Graphene nanoribbons (GNRs) are at the frontier of research on graphene materials since the 1D quantum confinement of electrons allows for the opening of an energy gap.

Impact of LiTi2(PO4)3 coating on the electrochemical performance of Li1.2Ni0.13Mn0.54Co0.13O2 using a wet chemical method

Ionics ◽  
2021 ◽  
Vol 27 (4) ◽  
pp. 1465-1475
Author(s):  
Ning Zhang ◽  
Ying Li ◽  
Yadan Luo ◽  
Zhen Yang ◽  
Jiayao Lu
Keyword(s):  
Electrochemical Performance ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical

Hybrids of cobalt nanochains and polyvinylidene fluoride with enhanced microwave absorption performance

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55546-55551 ◽  
Author(s):  
Shu-Qing Lv ◽  
Ya-Fei Pan ◽  
Pei-Bo Yang ◽  
Guang-Sheng Wang
Keyword(s):  
Microwave Absorption ◽  
Polyvinylidene Fluoride ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Absorption Properties ◽  
Flexible Film ◽  
Absorption Performance ◽  
Wet Chemical ◽  
Microwave Absorption Performance

By using a simple wet chemical method and hot-molding procedure, a kind of flexible film with enhance absorption properties based on binary cobalt nanochains/polyvinylidene fluoride (PVDF) hybrids has been successfully fabricated.

Development of a wet chemical method for the synthesis of arrayed ZnO nanorods

2010 ◽  
Vol 500 (2) ◽  
pp. L17-L21 ◽  
Author(s):  
Shao-Hwa Hu ◽  
Yi-Chuan Chen ◽  
Chyi-Ching Hwang ◽  
Cheng-Hsiung Peng ◽  
Dah-Chuan Gong
Keyword(s):  
Chemical Method ◽  
Zno Nanorods ◽  
Wet Chemical Method ◽  
Wet Chemical

scholarly journals Characterization of ferrite nanoparticles for preparation of biocomposites

2017 ◽  
Vol 8 ◽  
pp. 1257-1265 ◽  
Author(s):  
Urszula Klekotka ◽  
Magdalena Rogowska ◽  
Dariusz Satuła ◽  
Beata Kalska-Szostko
Keyword(s):  
Chemical Method ◽  
Ferrite Nanoparticles ◽  
Chemical Activity ◽  
Nominal Composition ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Transmission Electron ◽  
Wet Chemical

Ferrite nanoparticles with nominal composition Me0.5Fe2.5O4 (Me = Co, Fe, Ni or Mn) have been successfully prepared by the wet chemical method. The obtained particles have a mean diameter of 11–16 ± 2 nm and were modified to improve their magnetic properties and chemical activity. The surface of the pristine nanoparticles was functionalized afterwards with –COOH and –NH2 groups to obtain a bioactive layer. To achieve our goal, two different modification approaches were realized. In the first one, glutaraldehyde was attached to the nanoparticles as a linker. In the second one, direct bonding of such nanoparticles with a bioparticle was studied. In subsequent steps, the nanoparticles were immobilized with enzymes such as albumin, glucose oxidase, lipase and trypsin as a test bioparticles. The characterization of the nanoparticles was acheived by transmission electron microscopy, X-ray diffraction, energy dispersive X-ray and Mössbauer spectroscopy. The effect of the obtained biocomposites was monitored by Fourier transform infrared spectroscopy. The obtained results show that in some cases the use of glutaraldehyde was crucial (albumin).

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