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Dobryden I, Borgani R, Rigoni F, Ghamgosar P, Concina I, Almqvist N, Vomiero A. Nanoscale characterization of an all-oxide core-shell nanorod heterojunction using intermodulation atomic force microscopy (AFM) methods. NANOSCALE ADVANCES 2021; 3:4388-4394. [PMID: 36133465 PMCID: PMC9417462 DOI: 10.1039/d1na00319d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 05/19/2021] [Indexed: 06/16/2023]
Abstract
The electrical properties of an all-oxide core-shell ZnO-Co3O4 nanorod heterojunction were studied in the dark and under UV-vis illumination. The contact potential difference and current distribution maps were obtained utilizing new methods in dynamic multifrequency atomic force microscopy (AFM) such as electrostatic and conductive intermodulation AFM. Light irradiation modified the electrical properties of the nanorod heterojunction. The new techniques are able to follow the instantaneous local variation of the photocurrent, giving a two-dimensional (2D) map of the current-voltage curves and correlating the electrical and morphological features of the heterostructured core-shell nanorods.
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Affiliation(s)
- Illia Dobryden
- Division of Surface and Corrosion Science, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology Stockholm Sweden
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
| | - Riccardo Borgani
- Nanostructure Physics, KTH Royal Institute of Technology Stockholm Sweden
| | - Federica Rigoni
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice Venezia Mestre Italy
| | - Pedram Ghamgosar
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
| | - Isabella Concina
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
| | - Nils Almqvist
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
| | - Alberto Vomiero
- Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology Luleå Sweden
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice Venezia Mestre Italy
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Albonetti C, Chiodini S, Annibale P, Stoliar P, Martinez RV, Garcia R, Biscarini F. Quantitative phase-mode electrostatic force microscopy on silicon oxide nanostructures. J Microsc 2020; 280:252-269. [PMID: 32538463 DOI: 10.1111/jmi.12938] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/05/2020] [Accepted: 06/12/2020] [Indexed: 02/02/2023]
Abstract
Phase-mode electrostatic force microscopy (EFM-Phase) is a viable technique to image surface electrostatic potential of silicon oxide stripes fabricated by oxidation scanning probe lithography, exhibiting an inhomogeneous distribution of localized charges trapped within the stripes during the electrochemical reaction. We show here that these nanopatterns are useful benchmark samples for assessing the spatial/voltage resolution of EFM-phase. To quantitatively extract the relevant observables, we developed and applied an analytical model of the electrostatic interactions in which the tip and the surface are modelled in a prolate spheroidal coordinates system, fitting accurately experimental data. A lateral resolution of ∼60 nm, which is comparable to the lateral resolution of EFM experiments reported in the literature, and a charge resolution of ∼20 electrons are achieved. This electrostatic analysis evidences the presence of a bimodal population of trapped charges in the nanopatterned stripes.
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Affiliation(s)
- C Albonetti
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), Bologna, Italy
| | - S Chiodini
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), Bologna, Italy.,Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, Zaragoza, Spain
| | - P Annibale
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), Bologna, Italy.,Present address: Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - P Stoliar
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), Bologna, Italy.,National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - R V Martinez
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid, Spain.,Present address: School of Industrial Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - R Garcia
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid, Spain
| | - F Biscarini
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), Bologna, Italy.,Department of Life Sciences, Università di Modena e Reggio Emilia, Modena, Italy.,Center for Translational Neurophysiology-Istituto Italiano di Tecnologia, Ferrara, Italy
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Inganäs O. Organic Photovoltaics over Three Decades. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1800388. [PMID: 29938847 DOI: 10.1002/adma.201800388] [Citation(s) in RCA: 230] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/20/2018] [Indexed: 05/20/2023]
Abstract
The development of organic semiconductors for photovoltaic devices, over the last three decades, has led to unexpected performance for an alternative choice of materials to convert sunlight to electricity. New materials and developed concepts have improved the photovoltage in organic photovoltaic devices, where records are now found above 13% power conversion efficiency in sunlight. The author has stayed with the topic of organic materials for energy conversion and energy storage during these three decades, and makes use of the Hall of Fame now built by Advanced Materials, to present his view of the path travelled over this time, including motivations, personalities, and ambitions.
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Affiliation(s)
- Olle Inganäs
- Biomolecular and Organic Electronics, Department of Physics, Chemistry and Biology (IFM), Linköping University, S-581 83, Linköping, Sweden
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