NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods

Jun Kue Park; Hyeok Jung Kwon; Cheol Eui Lee

doi:10.1038/srep23378

NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods

Jun Kue Park, Hyeok Jung Kwon, Cheol Eui Lee

Department of Physics

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

14 Citations (Scopus)

Abstract

The diffusion properties of H⁺ in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using 1 H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High-energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ∼1 ppm, implying the presence of structural disorder at the ZnO surface.

Original language	English
Article number	23378
Journal	Scientific reports
Volume	6
DOIs	https://doi.org/10.1038/srep23378
Publication status	Published - 2016 Mar 18

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title = "NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods",

abstract = "The diffusion properties of H+ in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using 1 H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High-energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ∼1 ppm, implying the presence of structural disorder at the ZnO surface.",

author = "Park, {Jun Kue} and Kwon, {Hyeok Jung} and Lee, {Cheol Eui}",

note = "Funding Information: This work has been supported through KOMAC operation fund of KAERI by Ministry of Science ICT and Future Planning of Korean Government. The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.",

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doi = "10.1038/srep23378",

language = "English",

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T1 - NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods

AU - Park, Jun Kue

AU - Kwon, Hyeok Jung

AU - Lee, Cheol Eui

N1 - Funding Information: This work has been supported through KOMAC operation fund of KAERI by Ministry of Science ICT and Future Planning of Korean Government. The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

PY - 2016/3/18

Y1 - 2016/3/18

N2 - The diffusion properties of H+ in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using 1 H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High-energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ∼1 ppm, implying the presence of structural disorder at the ZnO surface.

AB - The diffusion properties of H+ in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using 1 H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High-energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ∼1 ppm, implying the presence of structural disorder at the ZnO surface.

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DO - 10.1038/srep23378

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VL - 6

JO - Scientific Reports

JF - Scientific Reports

M1 - 23378

ER -

NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods

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