skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: NMR study of vacancy and structure-induced changes in Cu 2-x Te

; ; ;
Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Physics and Chemistry of Solids
Additional Journal Information:
Journal Volume: 106; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-14 19:05:13; Journal ID: ISSN 0022-3697
Country of Publication:
United Kingdom

Citation Formats

Sirusi, Ali A., Page, Alexander, Uher, Ctirad, and Ross, Jr., Joseph H.. NMR study of vacancy and structure-induced changes in Cu 2-x Te. United Kingdom: N. p., 2017. Web. doi:10.1016/j.jpcs.2017.02.016.
Sirusi, Ali A., Page, Alexander, Uher, Ctirad, & Ross, Jr., Joseph H.. NMR study of vacancy and structure-induced changes in Cu 2-x Te. United Kingdom. doi:10.1016/j.jpcs.2017.02.016.
Sirusi, Ali A., Page, Alexander, Uher, Ctirad, and Ross, Jr., Joseph H.. 2017. "NMR study of vacancy and structure-induced changes in Cu 2-x Te". United Kingdom. doi:10.1016/j.jpcs.2017.02.016.
title = {NMR study of vacancy and structure-induced changes in Cu 2-x Te},
author = {Sirusi, Ali A. and Page, Alexander and Uher, Ctirad and Ross, Jr., Joseph H.},
abstractNote = {},
doi = {10.1016/j.jpcs.2017.02.016},
journal = {Journal of Physics and Chemistry of Solids},
number = C,
volume = 106,
place = {United Kingdom},
year = 2017,
month = 7

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jpcs.2017.02.016

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

Save / Share:
  • Although optically active defects in nanodiamond are being considered as candidates for optical labeling in biomedical applications, development in this area is being hindered the fact that suitable defects are rarely seen in diamond nanoparticles in the size regime required. These defects usually form as a complex with an impurity and a neutral of charged vacancy, so a measurable concentration of vacancy point defects is also necessary. Presented here are results of density functional tight binding computer simulations investigating the stability of vacancies in diamond nanoparticles with different surface structures. The results indicate that both neutral and charged vacancies altermore » the structure of as-grown diamond nanoparticles and are likely to diffuse out of the particle during synthesis or irradiation. We also find that suitable passivation of the particle may alleviate this problem, and hence facilitate the formation of defect complexes.« less
  • Freeze-fracture electron microscopy is used to examine the molecular architecture of bean-leaf pallisade parenchyma cells before and after exposure to ozone. Eight day old Phaseolus vulgaris plants were exposed to 490 3/ (0.25 ppm) ozone for two hours. Thin sections show no detectable alteration in ultrastructure after exposure although this O/sub 3/ level is sufficient to produce visible damage after four days. Freeze-fracture replicas show a marked transformation of membrane structure. The outer chloroplast, nuclear and plasma membranes each show approximately a 10-fold increase in the density of intramembranous protein particles. Each membrane type has a characteristic particle sizemore » which is maintained during the ozone response. Some cellular membranes, by contrast, exhibit no increase in protein density in response to O/sub 3/. The redistribution of membrane proteins which is the earliest observed structural response to O/sub 3/ stress may represent insertion of new components into the membrane or migration of protein complexes in the plane of the membrane and may be related to the reported membrane permeability changes which can lead to further damage and death. Experiments are in progress to determine the shortest exposure time in which membrane structure changes can be observed and the reversibility of this phenomenon.« less
  • Near-edge x-ray absorption fine-structure studies above the C and O K edges for CO on Pt(111) reveal a 4-eV shift of the sigma shape resonance when Na(0.2 monolayer) is coabsorbed. This allows determination of a Na-induced (0.12 +- 0.03)-A expansion of the C-O bond. Na does not affect the vertical molecular orientation on the surface. Reduction and broadening of the 1s..-->..2..pi..( resonance and the CO bond lengthening in the presence of Na signifies substantially increased metal to CO backbonding.
  • No abstract prepared.
  • A unique chemisorption structure has been determined for the ({radical}(3){times}{radical}(3))R30{degree}thinspH-Be(0001) phase formed at a saturation coverage of 1 ML and T{le}270K. The analysis of low-energy electron diffraction data shows that (1) /(3) of the Be top layer atoms are removed to form a honeycomb structure of Be vacancies. Each vacancy is decorated by three H adatoms bonded in tilted bridge sites with a H-Be bond length and angle of 1.53 {Angstrom} ({plus_minus}0.2) and 42{degree}({plus_minus}10), respectively. {copyright} {ital 1999} {ital The American Physical Society}