Nuclear-Magnetic-Resonance Study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Co</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in CdS

Locker, Donald R.

doi:10.1103/physrevb.6.713

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…The initially built structures were first equilibrated at constant pressure for 500 ps and then at constant volume for another 500 ps at 300 K temperature before subjecting them to tensile load. The Debye temperature of the ZnS and CdS are 277 ± 7 K [66] and 210 ± 20 K [67], respectively. So we expect all the vibrational modes to be excited while doing MD simulation at 300 K. The tensile process was carried out by separating a few of the top and bottom layers of atoms, considering them to be two rigid blocks, in a stepwise manner.…”

Section: Methodsmentioning

confidence: 99%

Tunable mechanical and thermal properties of ZnS/CdS core/shell nanowires

2015

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Using all atom molecular dynamics (MD) simulations, we have studied the mechanical properties of ZnS/CdS core/shell nanowires. Our results show that the coating of a few atomic layer CdS shell on the ZnS nanowire leads to a significant change in the stiffness of the core/shell nanowires compared to the stiffness of pure ZnS nanowires. The binding energy between the core and shell region decreases due to the lattice mismatch at the core-shell interface. This reduction in binding energy plays an important role in determining the stiffness of a core/shell nanowire. We have also investigated the effects of the shell on the thermal conductivity and melting behavior of the nanowires.

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Section: Methodsmentioning

confidence: 99%

Tunable mechanical and thermal properties of ZnS/CdS core/shell nanowires

2015

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“…The entrapment of manganese within the inverted micelles at the surface of the nanoparticles affords accessibility to water and eliminates detrimental interactions with surface homing ligands or surrounding plasma proteins. Nonbiotinylated (Mn(III)-labeled, 5) and biotinylated nanobialys without metal (6) were produced as controls (Scheme 1).…”

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confidence: 99%

“…A single slice inversion recovery sequence (i.e, the Look-Locker technique) 6 was used to calculate the ionic (per metal) and particulate (per particle) r 1 relaxivities of serially diluted nanobialys at 1.5 T and 25 °C. The ionic r 1 and r 2 relaxivities of Mn(III)-labeled nanobialys were 3.7 ± 1.1 (s · mmol The concept of MR molecular imaging of fibrin, a critical component of intravascular thromboses, was studied in vitro.…”

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confidence: 99%

“…Fibrin-rich clots supported on silk suture were suspended in phosphate buffered saline (PBS, pH 7.4) with sealed polystyrene test tubes (75 mm). Nanobialys with biotin and metal (1), with biotin and no metal (6), or no biotin with metal (5) were targeted to the fibrin clots with classic avidin-biotin interactions and wellcharacterized biotinylated fibrin-specific monoclonal antibodies (NIB5F3). 7 Magnetic resonance images (3 T) of the clots were acquired using T1-weighted gradient echo images and a birdcage coil oriented with all groups visible within the imaging slice.…”

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confidence: 99%

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Ligand-Directed Nanobialys as Theranostic Agent for Drug Delivery and Manganese-Based Magnetic Resonance Imaging of Vascular Targets

et al. 2008

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Noninvasive magnetic resonance (MR) molecular imaging and targeted drug delivery systems, often referred to as theranostic agents, are being developed to enable improved detection, patient risk stratification, site-specific treatment, and longitudinal monitoring. 1 One example of these agents, a gadolinium-based perfluoro-carbon nanoparticle, has been used to detect, characterize, treat, and follow angiogenesis in preclinical models of cancer and atherosclerosis. Despite the preclinical success of this and related nanotechnology platforms, the recent discovery of nephrogenic systemic fibrosis (NSF), a serious and unexpected side effect of gadolinium blood pool agents observed in some patients with renal disease or following liver transplant, has cast a shadow on currently approved MR contrast agents. 2 Patients with NSF develop thickening of the skin and connective tissues that can inhibit arm and leg movements and even lead to bone fractures. Approximately 5% of patients experience a rapidly progressive course, which may result in death due to widespread fibrosis. The cause of NSF is unknown and there is no effective treatment of this condition. Although gadolinium has been the dominant paramagnetic metal for MR contrast agents, the issue of NSF has induced consideration of alternative approaches.Manganese was one of the first reported examples 3,4 of paramagnetic contrast material studied in cardiac and hepatic MRI because of its efficient R 1 enhancement. Similar to Ca 2+ and unlike the lanthanides, manganese is a natural cellular constituent, and often a cofactor for enzymes and receptors. Manganese blood pool agents, such as mangafodipir trisodium, have been approved as a hepatocyte-specific contrast agent with transient side-effects due to dechelation of manganese from the linear chelate. Nontargeted liposomal agents have included MnSO 4 3c or Mn-DTPA. 3d Release of Mn caused by disruption of the vesicles allowed MR detection of sites where the vesicles were non-specifically entrapped.Manganese(III)-labeled nanobialys (1) are a potential targeted MR theranostic nanoparticle produced by molecular self-assembly of amphiphilic branched polyethylenimine, which has a toroidal shape, tunable particle size, and low polydispersity. The "bialy" shape affords increased stability and presents kinetically stable, porphyrin coupled Mn(III) complexes directly to the surrounding water. In a typical synthesis, commercially available branched polyethylenimines (MW = 10 kDa) are hydrophobically modified (nominal 55% conjugation of the 1° amine) with linoleic acid by activating the carboxylic acid groups with 1-(3′-dimethylaminopropyl)-3-ethylcarbodiimide methiodide (1.2 equiv) and allowing the reaction overnight at ambient temperature. Supramolecular self-assembly of the amphiphilic polymer in anhydrous chloroform, assumes inverted micellar 5 structures (2) that are able to transfer a water soluble new candidate contrast agent Mn(III)-protoporphyrin chloride (Mn-PPC, 4) into chloroform. Synergistic self-assembly of the ag...

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Cadmium sulfide (CdS) Debye temperature, heat capacity, density, melting point, hardness

Landolt-Börnstein - Group III Condensed Matter

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Nuclear-Magnetic-Resonance Study ofCo2+in CdS

Abstract: Nuclear spin-lattice relaxation times, T&, have been measured over a temperature range T = (1.1-300) K and frequency range v =2-15 MHz in a single crystal of CdS doped with 13-ppm cobalt. Minima in T& vs T are observed, and absolute values of the effective electron relaxa-

Cited by 3 publications

References 7 publications

Tunable mechanical and thermal properties of ZnS/CdS core/shell nanowires

Tunable mechanical and thermal properties of ZnS/CdS core/shell nanowires

Ligand-Directed Nanobialys as Theranostic Agent for Drug Delivery and Manganese-Based Magnetic Resonance Imaging of Vascular Targets

Cadmium sulfide (CdS) Debye temperature, heat capacity, density, melting point, hardness

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