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Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement

Hierarchical Si/ZnO trunk-branch nanostructures (NSs) have been synthesized by hot wire assisted chemical vapor deposition method for trunk Si nanowires (NWs) on indium tin oxide (ITO) substrate and followed by the vapor transport condensation (VTC) method for zinc oxide (ZnO) nanorods (NRs) which w...

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Autores principales: Dee, Chang Fu, Chong, Su Kong, Rahman, Saadah Abdul, Omar, Fatin Saiha, Huang, Nay Ming, Majlis, Burhanuddin Yeop, Salleh, Muhamad Mat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160322/
https://www.ncbi.nlm.nih.gov/pubmed/25246872
http://dx.doi.org/10.1186/1556-276X-9-469
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author Dee, Chang Fu
Chong, Su Kong
Rahman, Saadah Abdul
Omar, Fatin Saiha
Huang, Nay Ming
Majlis, Burhanuddin Yeop
Salleh, Muhamad Mat
author_facet Dee, Chang Fu
Chong, Su Kong
Rahman, Saadah Abdul
Omar, Fatin Saiha
Huang, Nay Ming
Majlis, Burhanuddin Yeop
Salleh, Muhamad Mat
author_sort Dee, Chang Fu
collection PubMed
description Hierarchical Si/ZnO trunk-branch nanostructures (NSs) have been synthesized by hot wire assisted chemical vapor deposition method for trunk Si nanowires (NWs) on indium tin oxide (ITO) substrate and followed by the vapor transport condensation (VTC) method for zinc oxide (ZnO) nanorods (NRs) which was laterally grown from each Si nanowires (NWs). A spin coating method has been used for zinc oxide (ZnO) seeding. This method is better compared with other group where they used sputtering method for the same process. The sputtering method only results in the growth of ZnO NRs on top of the Si trunk. Our method shows improvement by having the growth evenly distributed on the lateral sides and caps of the Si trunks, resulting in pine-leave-like NSs. Field emission scanning electron microscope image shows the hierarchical nanostructures resembling the shape of the leaves of pine trees. Single crystalline structure for the ZnO branch grown laterally from the crystalline Si trunk has been identified by using a lattice-resolved transmission electron microscope. A preliminary photoelectrochemical (PEC) cell testing has been setup to characterize the photocurrent of sole array of ZnO NR growth by both hydrothermal-grown (HTG) method and VTC method on ITO substrates. VTC-grown ZnO NRs showed greater photocurrent effect due to its better structural properties. The measured photocurrent was also compared with the array of hierarchical Si/ZnO trunk-branch NSs. The cell with the array of Si/ZnO trunk-branch NSs revealed four-fold magnitude enhancement in photocurrent density compared with the sole array of ZnO NRs obtain from VTC processes.
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spelling pubmed-41603222014-09-22 Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement Dee, Chang Fu Chong, Su Kong Rahman, Saadah Abdul Omar, Fatin Saiha Huang, Nay Ming Majlis, Burhanuddin Yeop Salleh, Muhamad Mat Nanoscale Res Lett Nano Express Hierarchical Si/ZnO trunk-branch nanostructures (NSs) have been synthesized by hot wire assisted chemical vapor deposition method for trunk Si nanowires (NWs) on indium tin oxide (ITO) substrate and followed by the vapor transport condensation (VTC) method for zinc oxide (ZnO) nanorods (NRs) which was laterally grown from each Si nanowires (NWs). A spin coating method has been used for zinc oxide (ZnO) seeding. This method is better compared with other group where they used sputtering method for the same process. The sputtering method only results in the growth of ZnO NRs on top of the Si trunk. Our method shows improvement by having the growth evenly distributed on the lateral sides and caps of the Si trunks, resulting in pine-leave-like NSs. Field emission scanning electron microscope image shows the hierarchical nanostructures resembling the shape of the leaves of pine trees. Single crystalline structure for the ZnO branch grown laterally from the crystalline Si trunk has been identified by using a lattice-resolved transmission electron microscope. A preliminary photoelectrochemical (PEC) cell testing has been setup to characterize the photocurrent of sole array of ZnO NR growth by both hydrothermal-grown (HTG) method and VTC method on ITO substrates. VTC-grown ZnO NRs showed greater photocurrent effect due to its better structural properties. The measured photocurrent was also compared with the array of hierarchical Si/ZnO trunk-branch NSs. The cell with the array of Si/ZnO trunk-branch NSs revealed four-fold magnitude enhancement in photocurrent density compared with the sole array of ZnO NRs obtain from VTC processes. Springer 2014-09-04 /pmc/articles/PMC4160322/ /pubmed/25246872 http://dx.doi.org/10.1186/1556-276X-9-469 Text en Copyright © 2014 Dee et al.; licensee Springer. http://creativecommons.org/licenses/by/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Dee, Chang Fu
Chong, Su Kong
Rahman, Saadah Abdul
Omar, Fatin Saiha
Huang, Nay Ming
Majlis, Burhanuddin Yeop
Salleh, Muhamad Mat
Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title_full Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title_fullStr Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title_full_unstemmed Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title_short Hierarchical Si/ZnO trunk-branch nanostructure for photocurrent enhancement
title_sort hierarchical si/zno trunk-branch nanostructure for photocurrent enhancement
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160322/
https://www.ncbi.nlm.nih.gov/pubmed/25246872
http://dx.doi.org/10.1186/1556-276X-9-469
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