1. Sutripto Majumder and Babasaheb R. Sankapal
February 10-12, 2017, Mahatma Gandhi University, Kottayam, Kerala, India
Synthesis and characterization of PbS nanoparticles over CdS nanowires to form CdS/PbS core-shell nanowire heterostructure
Sutripto Majumder and Babasaheb R. Sankapal
Nanomaterials and device laboratory, Department of Applied Physics, Visvesvaraya National Institute of Technology, South Ambazari Road, Nagpur, Maharashtra, , India.
1.Abstract
3. Graphical Representation of Synthesis
Hierarchical one dimensional CdS/PbS core-shell heterostructure has been synthesized through simple wet chemical approach.
At 15 SILAR cycles shows uniform coverage of PbS nanoparticles over CdS NWs.
The characterization such as FESEM, HR-TEM, XRD, XPS and UV-Vis-NIR also confirms the growth of CdS/PbS core-shell heterostructure
3.1. CdS flat
3.2. Cd(OH)2 NWs over CdS Flat
2. Flow Chart
4.1. CdS Flat
Transparent Conducting Glass
(FTO)
CdS flat Layer
Cd(OH)2 NWs
CdS NWs
Chemical Bath Deposition
Ion Exchange
CdS/PbS NWs
SILAR
Characterization
FESEM
HRTEM
XRD
XPS
UV-Vis-NIR
3.3. Conversion of Cd(OH)2 NWs into CdS NWs
FESEM of CdS NWs
3.4. Formation of CdS/PbS NWs through SILAR
Lead
Nitrate
Sodium
Sulfide
DDW
CdS NWs grown on CdS Flat coated FTO
Immersion
(I)
(II)
Rinsing
Pb2+
S2-
PbS
Cu50.5Zr42.2Ti7.3
PHS =  4.60 kJ/mol
FESEM of CdS/PbS NWs
4. Characterizations
4.1.XRD analysis
4.2. Optical Studies
4.3. TEM analysis
High Resolution for CdS/PbS core shell nano structure
4.4.XPS analysis
Cu-Zr-(Ag, Al) Systems
5. Conclusions
Being a facile chemical route SILAR has been employed to anchor PbS nanoparticles over CBD grown CdS NWs to form core-shell structure.
Acknowledgement
Director VNIT for Institute Fellowship .
ESCA lab of IIT-Bombay for providing XPS facilities
CRF, IIT-KGP for providing TEM facilities.
STIC ,Cochin for providing UV-Vis-NIR facilities..