Abstract
Metal-oxide nanowires have demonstrated excellent capability in the electrical detection of various molecules based on their material robustness in liquid and air environments. Although the surface structure of the nanowires essentially determines their interaction with adsorbed molecules, understanding the correlation between an oxide nanowire surface and an adsorbed molecule is still a major challenge. Herein, we propose a rational methodology to obtain this information for low-density molecules adsorbed on metal oxide nanowire surfaces by employing infrared p-polarized multiple-angle incidence resolution spectroscopy and temperature-programmed desorption/gas chromatography-mass spectrometry. As a model system, we studied the surface chemical transformation of an aldehyde (nonanal, a cancer biomarker in breath) on single-crystalline ZnO nanowires. We found that a slight surface reconstruction, induced by the thermal pretreatment, determines the surface chemical reactivity of nonanal. The present results show that the observed surface reaction trend can be interpreted in terms of the density of Zn ions exposed on the nanowire surface and of their corresponding spatial arrangement on the surface, which promotes the reaction between neighboring adsorbed molecules. The proposed methodology will support a better understanding of complex molecular transformations on various nanostructured metal-oxide surfaces.
| Original language | English |
|---|---|
| Pages (from-to) | 2443-2449 |
| Number of pages | 7 |
| Journal | Nano Letters |
| Volume | 19 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 10 2019 |
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All Science Journal Classification (ASJC) codes
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Rational Method of Monitoring Molecular Transformations on Metal-Oxide Nanowire Surfaces. / Wang, Chen; Hosomi, Takuro; Nagashima, Kazuki; Takahashi, Tsunaki; Zhang, Guozhu; Kanai, Masaki; Zeng, Hao; Mizukami, Wataru; Shioya, Nobutaka; Shimoaka, Takafumi; Tamaoka, Takehiro; Yoshida, Hideto; Takeda, Seiji; Yasui, Takao; Baba, Yoshinobu; Aoki, Yuriko; Terao, Jun; Hasegawa, Takeshi; Yanagida, Takeshi.
In: Nano Letters, Vol. 19, No. 4, 10.04.2019, p. 2443-2449.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Rational Method of Monitoring Molecular Transformations on Metal-Oxide Nanowire Surfaces
AU - Wang, Chen
AU - Hosomi, Takuro
AU - Nagashima, Kazuki
AU - Takahashi, Tsunaki
AU - Zhang, Guozhu
AU - Kanai, Masaki
AU - Zeng, Hao
AU - Mizukami, Wataru
AU - Shioya, Nobutaka
AU - Shimoaka, Takafumi
AU - Tamaoka, Takehiro
AU - Yoshida, Hideto
AU - Takeda, Seiji
AU - Yasui, Takao
AU - Baba, Yoshinobu
AU - Aoki, Yuriko
AU - Terao, Jun
AU - Hasegawa, Takeshi
AU - Yanagida, Takeshi
PY - 2019/4/10
Y1 - 2019/4/10
N2 - Metal-oxide nanowires have demonstrated excellent capability in the electrical detection of various molecules based on their material robustness in liquid and air environments. Although the surface structure of the nanowires essentially determines their interaction with adsorbed molecules, understanding the correlation between an oxide nanowire surface and an adsorbed molecule is still a major challenge. Herein, we propose a rational methodology to obtain this information for low-density molecules adsorbed on metal oxide nanowire surfaces by employing infrared p-polarized multiple-angle incidence resolution spectroscopy and temperature-programmed desorption/gas chromatography-mass spectrometry. As a model system, we studied the surface chemical transformation of an aldehyde (nonanal, a cancer biomarker in breath) on single-crystalline ZnO nanowires. We found that a slight surface reconstruction, induced by the thermal pretreatment, determines the surface chemical reactivity of nonanal. The present results show that the observed surface reaction trend can be interpreted in terms of the density of Zn ions exposed on the nanowire surface and of their corresponding spatial arrangement on the surface, which promotes the reaction between neighboring adsorbed molecules. The proposed methodology will support a better understanding of complex molecular transformations on various nanostructured metal-oxide surfaces.
AB - Metal-oxide nanowires have demonstrated excellent capability in the electrical detection of various molecules based on their material robustness in liquid and air environments. Although the surface structure of the nanowires essentially determines their interaction with adsorbed molecules, understanding the correlation between an oxide nanowire surface and an adsorbed molecule is still a major challenge. Herein, we propose a rational methodology to obtain this information for low-density molecules adsorbed on metal oxide nanowire surfaces by employing infrared p-polarized multiple-angle incidence resolution spectroscopy and temperature-programmed desorption/gas chromatography-mass spectrometry. As a model system, we studied the surface chemical transformation of an aldehyde (nonanal, a cancer biomarker in breath) on single-crystalline ZnO nanowires. We found that a slight surface reconstruction, induced by the thermal pretreatment, determines the surface chemical reactivity of nonanal. The present results show that the observed surface reaction trend can be interpreted in terms of the density of Zn ions exposed on the nanowire surface and of their corresponding spatial arrangement on the surface, which promotes the reaction between neighboring adsorbed molecules. The proposed methodology will support a better understanding of complex molecular transformations on various nanostructured metal-oxide surfaces.
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U2 - 10.1021/acs.nanolett.8b05180
DO - 10.1021/acs.nanolett.8b05180
M3 - Article
VL - 19
SP - 2443
EP - 2449
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 4
ER -