Print Email Facebook Twitter Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals Title Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals Author Muhammed, M.A.H. Lamers, M. Baumann, V. Dey, P. Blanch, A.J. Polishchuk, I. Kong, X.T. Levy, D. Urban, A.S. Govorov, A.O. Pokroy, B. Rodríguez-Fernández, J. Feldmann, J. Publication year 2018 Abstract Elucidating the underlying principles behind band gap engineering is paramount for the successful implementation of semiconductors in photonic and optoelectronic devices. Recently it has been shown that the band gap of a wide and direct band gap semiconductor, such as ZnO, can be modified upon cocrystallization with amino acids, with the role of the biomolecules remaining unclear. Here, by probing and modeling the light-emitting properties of ZnO-amino acid cocrystals, we identify the amino acids' role on this band gap modulation and demonstrate their effective chirality transfer to the interband excitations in ZnO. Our 3D quantum model suggests that the strong band edge emission blue-shift in the cocrystals can be explained by a quasi-periodic distribution of amino acid potential barriers within the ZnO crystal lattice. Overall, our findings indicate that biomolecule cocrystallization can be used as a truly bio-inspired means to induce chiral quantum confinement effects in quasi-bulk semiconductors. Subject Amino acidsBiomoleculesEnergy gapII-VI semiconductorsLight emissionMagnetic semiconductorsOptoelectronic devicesQuantum confinementWide band gap semiconductorsZinc oxideAmino acid co-crystalsBand gap engineeringBand-edge emissionsDirect band gap semiconductorsInter-band excitationsLight emitting propertiesQuantum confinement effectsUnderlying principlesPhotonic band gap To reference this document use: http://resolver.tudelft.nl/uuid:74d9487a-65d6-405c-a88b-6ac81f208d27 DOI https://doi.org/10.1021/acs.jpcc.8b01567 TNO identifier 788253 Publisher American Chemical Society ISSN 1932-7447 Source Journal of Physical Chemistry C, 122 (11), 6348-6356 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.