Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals

Madathumpady Abubaker Habeeb Muhammed; Marlene Lamers; Verena Baumann; Priyanka Dey; Adam J. Blanch; Iryna Polishchuk; Xiang Tian Kong; Davide Levy; Alexander S. Urban; Alexander O. Govorov; Boaz Pokroy; Jessica Rodríguez-Fernández; Jochen Feldmann

doi:10.1021/acs.jpcc.8b01567

Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals

Madathumpady Abubaker Habeeb Muhammed, Marlene Lamers, Verena Baumann, Priyanka Dey, Adam J. Blanch, Iryna Polishchuk, Xiang Tian Kong, Davide Levy, Alexander S. Urban, Alexander O. Govorov, Boaz Pokroy, Jessica Rodríguez-Fernández, Jochen Feldmann

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English
Pages (from-to)	6348-6356
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	11
DOIs	https://doi.org/10.1021/acs.jpcc.8b01567
State	Published - 22 Mar 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

Funding

We thank support by the Bavarian State Ministry of Science, Research, and Arts through the grant “Solar Technologies go Hybrid” (SolTech). A.O.G. and X.-T.K. were supported by the Volkswagen Foundation. X.-T.K. was supported by the China Postdoctoral Science Foundation (2015M580778). B.P. acknowledges the funding received from the European Research Council under the European Union’s Seventh Framework Program (FP/2007-2013)/ERC Grant Agreement (No. 336077). We also acknowledge ID22 of the ESRF and Dr. Andy Fitch for support with these experiments. We also thank Prof. Tim Liedl and Dr. Eva Maria Roller for granting access to the CD instrumentation and technical support.

Funders	Funder number
Bavarian State Ministry of Science, Research, and Arts
Seventh Framework Programme	336077
European Commission
Volkswagen Foundation
China Postdoctoral Science Foundation	2015M580778
B.P. Koirala Institute of Health Sciences
Seventh Framework Programme	FP/2007-2013

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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. (2018). Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals. Journal of Physical Chemistry C, 122(11), 6348-6356. https://doi.org/10.1021/acs.jpcc.8b01567

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title = "Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals",

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.",

author = "Muhammed, {Madathumpady Abubaker Habeeb} and Marlene Lamers and Verena Baumann and Priyanka Dey and Blanch, {Adam J.} and Iryna Polishchuk and Kong, {Xiang Tian} and Davide Levy and Urban, {Alexander S.} and Govorov, {Alexander O.} and Boaz Pokroy and Jessica Rodr{\'i}guez-Fern{\'a}ndez and Jochen Feldmann",

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Muhammed, MAH, Lamers, M, Baumann, V, Dey, P, Blanch, AJ, Polishchuk, I, Kong, XT, Levy, D, Urban, AS, Govorov, AO, Pokroy, B, Rodríguez-Fernández, J & Feldmann, J 2018, 'Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals', Journal of Physical Chemistry C, vol. 122, no. 11, pp. 6348-6356. https://doi.org/10.1021/acs.jpcc.8b01567

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AU - Kong, Xiang Tian

AU - Levy, Davide

AU - Urban, Alexander S.

AU - Govorov, Alexander O.

AU - Pokroy, Boaz

AU - Rodríguez-Fernández, Jessica

AU - Feldmann, Jochen

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Strong Quantum Confinement Effects and Chiral Excitons in Bio-Inspired ZnO-Amino Acid Cocrystals

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