Abstract
Diffusive processes are ubiquitous in nature. In solid state physics, metallurgy and materials science the diffusivity of ions govern the functionality of many devices such as sensors or batteries. Motional processes on surfaces, across interfaces or through membranes can be quite different to that in the bulk. A direct, quantitative description of such local diffusion processes is, however, rare. Here, we took advantage of 7Li longitudinal nuclear magnetic relaxation to study, on the atomic length scale, the diffusive motion of lithium spins in the interfacial regions of nanocrystalline, orthorhombic LiBH4. Magnetization transients and free induction decays revealed a fast subset of Li ions having access to surface pathways that offer activation barriers (0.18 eV) much lower than those in the crystalline bulk regions (0.55 eV). These observations make orthorhombic borohydride a new nanostructured model system to study disorder-induced enhancements in interfacial diffusion processes.
| Original language | English |
|---|---|
| Pages (from-to) | 2093-2097 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 9 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 19 Apr 2018 |
Fingerprint
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Rapid Li Ion Dynamics in the Interfacial Regions of Nanocrystalline Solids. / Breuer, S.; Uitz, M.; Wilkening, H. M.R.
In: Journal of Physical Chemistry Letters, Vol. 9, No. 8, 19.04.2018, p. 2093-2097.Research output: Contribution to journal › Article › Research › peer-review
}
TY - JOUR
T1 - Rapid Li Ion Dynamics in the Interfacial Regions of Nanocrystalline Solids
AU - Breuer, S.
AU - Uitz, M.
AU - Wilkening, H. M.R.
PY - 2018/4/19
Y1 - 2018/4/19
N2 - Diffusive processes are ubiquitous in nature. In solid state physics, metallurgy and materials science the diffusivity of ions govern the functionality of many devices such as sensors or batteries. Motional processes on surfaces, across interfaces or through membranes can be quite different to that in the bulk. A direct, quantitative description of such local diffusion processes is, however, rare. Here, we took advantage of 7Li longitudinal nuclear magnetic relaxation to study, on the atomic length scale, the diffusive motion of lithium spins in the interfacial regions of nanocrystalline, orthorhombic LiBH4. Magnetization transients and free induction decays revealed a fast subset of Li ions having access to surface pathways that offer activation barriers (0.18 eV) much lower than those in the crystalline bulk regions (0.55 eV). These observations make orthorhombic borohydride a new nanostructured model system to study disorder-induced enhancements in interfacial diffusion processes.
AB - Diffusive processes are ubiquitous in nature. In solid state physics, metallurgy and materials science the diffusivity of ions govern the functionality of many devices such as sensors or batteries. Motional processes on surfaces, across interfaces or through membranes can be quite different to that in the bulk. A direct, quantitative description of such local diffusion processes is, however, rare. Here, we took advantage of 7Li longitudinal nuclear magnetic relaxation to study, on the atomic length scale, the diffusive motion of lithium spins in the interfacial regions of nanocrystalline, orthorhombic LiBH4. Magnetization transients and free induction decays revealed a fast subset of Li ions having access to surface pathways that offer activation barriers (0.18 eV) much lower than those in the crystalline bulk regions (0.55 eV). These observations make orthorhombic borohydride a new nanostructured model system to study disorder-induced enhancements in interfacial diffusion processes.
UR - http://www.scopus.com/inward/record.url?scp=85045740356&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.8b00418
DO - 10.1021/acs.jpclett.8b00418
M3 - Article
VL - 9
SP - 2093
EP - 2097
JO - The journal of physical chemistry letters
JF - The journal of physical chemistry letters
SN - 1948-7185
IS - 8
ER -