Quantum Dot

Quantum Dots and Self-assembled Q.dots-DNA Hybrids for dodge Interface and Biosensor Applications.

Institute of Physics Bhubaneswar 751007 E-mail:sahu@iopb.res.in

S. N. Sahu

1. institution 2. Semiconductor Nanocrystals 3. Nano-Bio systems 4. Applications 5. Conclusion

Nanostructure and cluster activities at Institute of Physics, Bhubaneswar
subtraction Routes chemical substance Cds Electrochemical CdSe GaAs Pbs HgS HgTe and Porous Si HgTe-DNA, CdSe-DNA and bio-molecular recognition Synthesis of nanostructures by solid-ion beam interaction by Sputtering, ion implantation and MeV ion calamus Theory: Electronic structure calculation Studies: Composition, thickness & impurity, Structure, size, Surface, Optical, Device/ Interfacial, Electronic structure, and Nano-bio systems Facilities at IOP: Accelerator, GXRD, HRTEM, AFM/ MFM. XPS, ARUPS, MBE, PL, Spectrophotometer, Raman, FTIR, LCR meter, LECBD set up, Chemical Lab.



X-ray reflectivity, Langmuir, Applications: Nano-Electronic Devices, UV Sensor, Bio-molecular recognition Cluster Sb and Se Sb2O3, and SeO2, (LECBD)

Nano-CdS

Optical assiduousness of CdS AFM of nano-CdS PL of CdS nanocrystals with aging effect

Visible light emission from CdS (a,b,c,d) and HgTe (a,b) under UV excitation
Acts as an UV sensor at room temperature

a) b)

downstairs white light Under UV light

(c ) New peaks bet with time. Deep trap positions (A) does not change with time where as shallow traps (B) move with increase in size- red shifted

Nano-HgTe
TEM Micrograph,SAD and histogram of HgTe Nanocrystals compositional dependent micro Raman spectra of nano-HgTe

Composition dependent optical assiduousness and PL of HgTe Nanocrystal

Nano-CdSe (a) (b)

( c) (d)
Glancing Angle X-ray Diffraction (GXRD) Spectra of CdSe nanocrystals

a) Fractal growth DLA pattern Dimension: 1.6 d) Histogram: think of Size: 7.5 nm

b) Micrograph c) SAD: Cubic phase Polycrystalline

Sample S(2) (2.22 eV) is blueing shifted by 0.52 eV from...If you want to get a climb essay, order it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .