Cryogenic Signal Amplification Combined with Helium-Temperature MAS DNP toward Ultimate NMR Sensitivity at High Field Conditions

Dynamic nuclear polarization (DNP) is widely used to enhance solid state nuclear magnetic resonance (NMR) sensitivity. Its efficiency as a generic signal-enhancing approach for liquid state NMR, however, decays rapidly...

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Toward Biocompatible Nuclear Hyperpolarization Using Signal Amplification by Reversible Exchange: Quantitative in Situ Spectroscopy and High-Field Imaging

Analytical Chemistry ◽

10.1021/ac403653q ◽

2014 ◽

Vol 86 (3) ◽

pp. 1767-1774 ◽

Cited By ~ 83

Author(s):

Jan-Bernd Hövener ◽

Niels Schwaderlapp ◽

Robert Borowiak ◽

Thomas Lickert ◽

Simon B. Duckett ◽

...

Keyword(s):

Signal Amplification ◽

High Field ◽

In Situ Spectroscopy ◽

High Field Imaging ◽

Field Imaging

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Brief communication: Empirical relation for the field dependence of electron mobility in II-VI compound semiconductors under high-field conditions

International Journal of Electronics ◽

10.1080/00207219008921148 ◽

1990 ◽

Vol 68 (1) ◽

pp. 75-77 ◽

Cited By ~ 2

Author(s):

A. DUTTA ◽

D. MUKHOPADHYAY

Keyword(s):

Field Dependence ◽

Electron Mobility ◽

High Field ◽

Empirical Relation ◽

Compound Semiconductors ◽

Field Conditions

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On the mechanism of cathodic growth of tungsten needles by decomposition of hexacarbonyltungsten under high field conditions

Applied Physics ◽

10.1007/bf00897937 ◽

1980 ◽

Vol 22 (1) ◽

pp. 83-87 ◽

Cited By ~ 18

Author(s):

H. B. Linden ◽

H. D. Beckey ◽

F. Okuyama

Keyword(s):

High Field ◽

Field Conditions

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Water accumulation as a function of temperature on specimens in an electron microscope cold stage

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100142219 ◽

1986 ◽

Vol 44 ◽

pp. 114-115 ◽

Cited By ~ 2

Author(s):

M.K. Lamvik ◽

D.A. Kopf ◽

S.D. Davilla ◽

J.D. Robertson

Keyword(s):

Electron Microscope ◽

Mass Loss ◽

Liquid Helium ◽

Liquid Nitrogen ◽

Liquid Nitrogen Temperature ◽

Liquid Helium Temperature ◽

Helium Temperature ◽

Cold Stage ◽

Water Accumulation ◽

Better Than

Last year we reported1 that there is a striking reduction in the rate of mass loss when a specimen is observed at liquid helium temperature. It is important to determine whether liquid helium temperature is significantly better than liquid nitrogen temperature. This requires a good understanding of mass loss effects in cold stages around 100K.

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Study of segregation in La1.8Sr0.2CuO4 superconductor by STEM-EDS microanalysis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100125294 ◽

1987 ◽

Vol 45 ◽

pp. 54-55

Author(s):

T. F. Kelly ◽

P. J. Lee ◽

E. E. Hellstrom ◽

D. C. Larbalestier

Keyword(s):

Rare Earth ◽

High Field ◽

Transport Current ◽

Total Thickness ◽

New Class ◽

Ceramic Superconductors ◽

Current Densities ◽

Group Ii ◽

Eds Microanalysis

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

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