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Core–shell semiconducting nanocrystals (CSSNCs) are a class of materials which have properties intermediate between those of small, individual molecules and those of bulk, crystalline semiconductors. They are unique because of their easily modular properties, which are a result of their size. These nanocrystals are composed of a quantum dot semiconducting core material and a shell of a distinct semiconducting material. The core and the shell are typically composed of type II–VI, IV–VI, and III–V semiconductors, with configurations such as CdS/ZnS, CdSe/ZnS, CdSe/CdS, and InAs/CdSe Organically passivated quantum dots have low fluorescence quantum yield due to surface related trap states. CSSNCs address this problem because the shell increases quantum yield by passivating the surface trap states. In addition, the shell provides protection against environmental changes, photo-oxidative degradation, and provides another route for modularity. Precise control of the size, shape, and composition of both the core and the shell enable the emission wavelength to be tuned over a wider range of wavelengths than with either individual semiconductor. These materials have found applications in biological systems and optics.
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Uri Banin is an Israeli nanotechnologist and physical chemist and a professor at the Hebrew University of Jerusalem, currently holding the Alfred & Erica Larisch Memorial Chair at the Institute of Chemistry. He is recognized as one of the pioneers of nanoscience in Israel.
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William L. Wilson is a black American chemist. He serves as the Executive Director of the Center for Nanoscale Systems (CNS) at Harvard University. At Bell Labs, Wilson collaborated with 2023 Nobel Prize in Chemistry awardees, Louis Brus and Moungi Bawendi, in the early development and characterization of colloidal semi-conductor nanocrystals known as quantum dots. As an expert in holographic technologies, Wilson co-founded InPhase Technologies and served as their Chief Scientific Officer.
References
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- 1 2 3 4 5 "Carnegie Mellon Materials Science and Engineering Seminar Series Christopher B. Murray" (PDF). Carnegie Mellon University. February 19, 2010.
- 1 2 3 "IBM's Chris Murray Joins Department of Chemistry | Department of Chemistry". Department of Chemistry, University of Pennsylvania. Oct 26, 2006.
- 1 2 3 Robinson, Julia (2023-10-11). "The quantum dot story". Chemistry World.
- ↑ Linke, Heiner (2023). Quantum dots – Seeds of Nanoscience. The Royal Swedish Academy of Sciences.
- 1 2 "Christopher B. Murray | Penn Arts & Sciences Endowed Professors". Department of Arts & Sciences, University of Pennsylvania.
- ↑ "Christopher B. Murray Inventions, Patents and Patent Applications - Justia Patents Search". patents.justia.com.
- ↑ "Past Recipients". American Chemical Society.
- ↑ "Archive Honorary Doctorates - Organisation - Utrecht University". Utrecht University.
- ↑ "Dies Natalis 2011, Utrecht University 375 anniversary - Organisation - Utrecht University". Utrecht University. Retrieved 13 October 2023.
- ↑ Flanagan, Dave (19 March 2012). "Materials Research Society Announces 2012 MRS Fellows". Advanced Science News.
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