Improvement of Terahertz Wave Radiation for InAs Nanowires by Simple Dipping into Tap Water.
Sci Rep
; 6: 36094, 2016 10 26.
Article
en En
| MEDLINE
| ID: mdl-27782220
ABSTRACT
We report improvement of terahertz (THz) wave radiation for Si-based catalyst-free InAs nanowires (NWs) by simple dipping into tap water (DTW). In addition, the possibility of using InAs NWs as a cost-effective method for biomedical applications is discussed by comparison to bulk InAs. The peak-to-peak current signals (PPCSs) of InAs NWs measured from THz time-domain spectroscopy increased with increasing NW height. For example, the PPCS of 10 µm-long InAs NWs was 2.86 times stronger than that of 2.1 µm-long NWs. The THz spectra of the InAs NWs obtained by applying a fast Fourier transformation to the current signals showed a main frequency of 0.5 THz, which can be applied to a variety of medical imaging systems. After the DTW process, structural variation was not observed for 2.1 µm-long InAs NWs. However, the top region of several InAs NWs with heights of 4.6 and 5.8 µm merged into a conical structure. InAs NWs with a height of 10 µm resulted in a bundle feature forming above the conical shape, where the length of bundle region was 4 µm. After the DTW process, the PPCS for 10 µm-long InAs NWs increased by 15 percent compared to that of the as-grown case.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Agua
/
Nanocables
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Espectroscopía de Terahertz
/
Radiación Terahertz
Idioma:
En
Revista:
Sci Rep
Año:
2016
Tipo del documento:
Article