Header

UZH-Logo

Maintenance Infos

Exploiting Endogenous Surface Defects for Dynamic Nuclear Polarization of Silicon Micro- and Nanoparticles


Kwiatkowski, Grzegorz; Polyhach, Yevhen; Jähnig, Fabian; Shiroka, Toni; Starsich, Fabian H L; Ernst, Matthias; Kozerke, Sebastian (2018). Exploiting Endogenous Surface Defects for Dynamic Nuclear Polarization of Silicon Micro- and Nanoparticles. Journal of Physical Chemistry C, 122(44):25668-25680.

Abstract

Micro- and nanoparticles of elemental, crystalline silicon represent an attractive target for a wide range of applications spanning from quantum computing to contrast agents for biomedical imaging applications. To overcome the low sensitivity of the 29Si nuclei in magnetic resonance, dynamic nuclear polarization (DNP), which exploits the endogenous surface defects as a source of polarization, can be used to temporarily boost nuclear polarization of the 29Si spin bath. In the present work, we have assessed a number of commercially available silicon micro- and nanoparticles concerning properties and characteristics under DNP conditions. It has been found that optimal physical and chemical conditions, including surface-defect concentration adjusted to the particle size, are necessary to achieve a high level of polarization enhancement.

Abstract

Micro- and nanoparticles of elemental, crystalline silicon represent an attractive target for a wide range of applications spanning from quantum computing to contrast agents for biomedical imaging applications. To overcome the low sensitivity of the 29Si nuclei in magnetic resonance, dynamic nuclear polarization (DNP), which exploits the endogenous surface defects as a source of polarization, can be used to temporarily boost nuclear polarization of the 29Si spin bath. In the present work, we have assessed a number of commercially available silicon micro- and nanoparticles concerning properties and characteristics under DNP conditions. It has been found that optimal physical and chemical conditions, including surface-defect concentration adjusted to the particle size, are necessary to achieve a high level of polarization enhancement.

Statistics

Citations

Dimensions.ai Metrics
6 citations in Web of Science®
5 citations in Scopus®
Google Scholar™

Altmetrics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Biomedical Engineering
Dewey Decimal Classification:170 Ethics
610 Medicine & health
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > General Energy
Physical Sciences > Physical and Theoretical Chemistry
Physical Sciences > Surfaces, Coatings and Films
Uncontrolled Keywords:General Energy, Physical and Theoretical Chemistry, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films
Language:English
Date:8 November 2018
Deposited On:06 Mar 2019 08:40
Last Modified:29 Jul 2020 10:03
Publisher:American Chemical Society (ACS)
ISSN:1932-7447
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/acs.jpcc.8b08926
Project Information:
  • : FunderSNSF
  • : Grant ID200021_149707
  • : Project TitleMethod Development for Dissolution Dynamic Nuclear Polarization
  • : FunderSNSF
  • : Grant ID200020_169879
  • : Project TitleMethod Development in Solid-State NMR and Dissolution DNP
  • : FunderSNSF
  • : Grant ID206021_170729
  • : Project TitleIntegrated system for in operando characterization and development of portable breath analyzers
  • : FunderSNSF
  • : Grant ID205320_163243
  • : Project TitleMultifunctional nanoparticles for targeted theranostics
  • : FunderSNSF
  • : Grant ID320030_153014
  • : Project TitleTranslational Microstructural and Metabolic Magnetic Resonance Imaging for Cardiac Regeneration Therapy

Download

Full text not available from this repository.
View at publisher

Get full-text in a library