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Protein-templated semiconductor nanoparticle chains
S Padalkar1, J D Hulleman, S M Kim
1School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
Nanotechnology
|August 11, 2011
Summary
Researchers created cadmium sulfide (CdS) and lead sulfide (PbS) semiconducting nanoparticle chains using protein amyloidogenicity. The diameter of these novel nanowires was controlled by adjusting process parameters.
Area of Science:
- Materials Science
- Nanotechnology
- Biotechnology
Background:
- Semiconducting nanoparticle chains offer unique electronic and optical properties.
- Controlling the size and structure of these chains is crucial for their applications.
- Protein self-assembly offers a potential route for fabricating ordered nanomaterials.
Purpose of the Study:
- To fabricate cadmium sulfide (CdS) and lead sulfide (PbS) semiconducting nanoparticle chains for the first time.
- To utilize the amyloidogenicity of proteins as a general templating mechanism for nanomaterial synthesis.
- To control the diameter of the synthesized nanoparticle chains.
Main Methods:
- Exploiting the amyloidogenicity of proteins to guide nanoparticle assembly.
- Synthesizing CdS and PbS nanoparticle chains through controlled precipitation.
- Tuning process parameters to control the diameter of the nanowires.
- Characterization using field emission scanning electron microscopy (FESEM), UV-visible spectroscopy, transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), and high-resolution transmission electron microscopy (HRTEM).
Main Results:
- Successful fabrication of CdS and PbS semiconducting nanoparticle chains.
- Demonstration of amyloidogenicity as a versatile protein property for nanomaterial synthesis.
- Achieved control over the diameter of the nanoparticle chains, ranging from approximately 50 to 350 nm.
- Comprehensive characterization confirming the structure and composition of the nanoparticle chains.
Conclusions:
- Amyloidogenicity provides a novel and general approach for synthesizing semiconducting nanoparticle chains.
- The developed method allows for tunable control over nanowire dimensions.
- These CdS and PbS nanoparticle chains hold potential for various electronic and optoelectronic applications.
