The transverse Ising model: a guide for combined modalities of hyperthermia and imaging

Singh, Vanchna; Banerjee, Varsha

doi:10.1088/0022-3727/46/38/385003

Cited by 7 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimized structural parameters are a = b = 4.7941 Å and c = 7.7353 Å. These results are in good agreement with experimental values and earlier theoretical data, [31][32][33] showing that the input parameters are reasonable and the obtained structure is correct. Owing to that, the optimized structure is adopted to carry out the subsequent calculations.…”

Section: Electronic and Phononic Structuressupporting

confidence: 87%

“…Along these lines, extensive investigations have been reported. 9,12,13,16,[26][27][28][29][30][31][32] To date, it is claimed that all the TE properties can be quantitatively calculated for the given lattice composition/structure and carrier concentration (n). 9,30 This framework takes into account the thermally induced carrier excitation and in this sense the bipolar effect is at least partially considered.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a p-type Zintl compound CaMg 2 Bi 2 was reported to exhibit relatively high ZT and PF. [31][32][33] A preliminary first-principles calculation predicted a direct band gap of B0.4 eV and roughly This journal is © the Owner Societies 2016 symmetric band profiles near the conduction band minimum (CBM) and the valence band maximum (VBM). These are proper indications of a strong bipolar effect.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Gong

Hong

Shuai

et al. 2016

Phys. Chem. Chem. Phys.

111

View full text Add to dashboard Cite

The bipolar effect in relatively narrow band-gap thermoelectric (TE) compounds is a negative process deteriorating the TE properties particularly at higher temperatures. In this work, we investigate the TE performance of the compound CaMg2Bi2 using the first-principles calculation and semi-classical Boltzmann transport theory in combination with our experimental data. It is revealed that this compound exhibits a remarkable bipolar effect and temperature-dependent carrier concentration. The bipolar effect imposes remarkable influence on all the electron-transport related TE parameters. An effective carrier concentration neff as a function of temperature is proposed to account for the bipolar effect induced carrier excitations. The as-evaluated TE parameters then show good consistency with measured results. This work may shed light on our understanding of the bipolar effect in TE compounds.

show abstract

Section: Electronic and Phononic Structuressupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Gong

Hong

Shuai

et al. 2016

Phys. Chem. Chem. Phys.

111

View full text Add to dashboard Cite

show abstract

“…18,20 These experiments reveal that the enhancement in ZT is attributed to the best control of carrier concentration. 18,20 Moreover, recent theoretical investigations of Mg 3 Sb 2 and a series of compounds, AeMg 2 Pn 2 (Ae = Ca, Sr, Ba; Pn = As, Sb, Bi) compounds, 29 also show that the optimization of the carrier concentration plays an important role in enhancing the thermoelectric properties of these compounds. Thus overall, we believe that isoelectronic Zn substitution on the Mg-site in Mg 3 Sb 2 will not only optimize the carrier concentration but such doping is also expected to bring a substantial change in the chemical bonding, affecting the physical and chemical properties of the system.…”

Section: Introductionmentioning

confidence: 99%

Tuning the carrier concentration using Zintl chemistry in Mg₃Sb₂, and its implications for thermoelectric figure-of-merit

Bhardwaj

Chauhan

Goel

et al. 2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Zintl compounds are potential candidates for efficient thermoelectric materials, because typically they are small band gap semiconductors. In addition, such compounds allow fine tuning of the carrier concentration by chemical doping for the optimization of thermoelectric performance. Herein, such tunability is demonstrated in Mg3Sb2-based Zintl compounds via Zn(2+) doping at the Mg(2+) site of the anionic framework (Mg2Sb2)(2-), in the series Mg3-xZnxSb2 (0 ≤ x ≤ 0.1). The materials have been successfully synthesized using the spark plasma sintering (SPS) technique. X-ray diffraction (XRD) analysis confirms a single solid solution phase of Mg3-xZnxSb2 (0 ≤ x ≤ 0.1). The thermoelectric properties are characterized by the Seebeck coefficient, electrical conductivity, and thermal conductivity measurements from 323 K to 773 K. Isoelectronic Zn substitution at the Mg site presents the controlled variation in the carrier concentration for optimizing the high power factor and reduced thermal conductivity. These results lead to a substantial increase in ZT of 0.37 at 773 K for a composition with x = 0.10 which is ∼42% higher than undoped Mg3Sb2. The electronic transport data for the Mg3-xZnxSb2 (0 ≤ x ≤ 0.1) compound are analyzed using a single parabolic band model predicting that Mg2.9Zn0.1Sb2 exhibits a near-optimal carrier concentration for high ZT. The electronic structure of transport properties of these disordered Mg3-xZnxSb2 (0 ≤ x ≤ 0.1) is also studied using density functional theory and the results obtained are in good agreement with experimental results. The low cost, lightness and non-toxicity of the constituent elements make these materials ideal for mid-temperature thermoelectric applications.

show abstract

“…5 The most significant application of magnetic nanoparticles (MNPs) is in cancer hyperthermia therapy, in which cancerous cells or tumors can be cured or destroyed by elevating the temperature in the range of 42-46 °C by using MNPs and application of an external alternating magnetic field. 6,7 For the efficient coating of magnetic nanoparticles to maintain their colloidal properties and biocompatibility, a variety of surfactants from polymeric to non-polymeric molecules, such as lipids and proteins, have been used to coat magnetic nanoparticles to prevent aggregation caused by magnetic dipole-dipole attractions between nanoparticles. 1 Among a wide spectrum of coating materials, chitosan may be considered as one of the important candidates because of its excellent biocompatibility, low toxicity and commendable biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and biocompatibility of chitosan functionalized superparamagnetic nanoparticles for heat activated curing of cancer cells

et al. 2014

View full text Add to dashboard Cite

Surface functionalization, colloidal stability and biocompatibility of magnetic nanoparticles are crucial for their biological applications. Here, we report a synthetic approach for the direct preparation of superparamagnetic nanoparticles consisting of a perovskite LSMO core modified with a covalently linked chitosan shell that provides colloidal stability in aqueous solutions for cancer hyperthermia therapy. The characterization of the core-shell nanostructure using Fourier transform infrared spectroscopy; thermo-gravimetric analysis to assess the chemical bonding of chitosan to nanoparticles; field-emission scanning electron microscopy and transmission electron microscopy for its size and coating efficiency estimation; and magnetic measurement for their magnetization properties was performed. Zeta potential and light scattering studies of the core shell revealed it to possess good colloidal stability. Confocal microscopy and MTT assay are performed for qualitative and quantitative measurement of cell viability and biocompatibility. In depth cell morphology and biocompatibility is evaluated by using multiple-staining of different dyes. The magnetic@chitosan nanostructure system is found to be biocompatible up to 48 h with 80% cell viability. Finally, an in vitro cancer hyperthermia study is done on the MCF7 cell line. During in vitro hyperthermia treatment of cancer cells, cell viability is reduced upto 40% within 120 min with chitosan coated nanoparticles. Our results demonstrate that this simplified and facile synthesis strategy shows potential for designing a colloidal stable state and biocompatible core shell nanostructures for cancer hyperthermia therapy.

show abstract

The transverse Ising model: a guide for combined modalities of hyperthermia and imaging

Cited by 7 publications

References 21 publications

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Tuning the carrier concentration using Zintl chemistry in Mg₃Sb₂, and its implications for thermoelectric figure-of-merit

Synthesis, characterization and biocompatibility of chitosan functionalized superparamagnetic nanoparticles for heat activated curing of cancer cells

Contact Info

Product

Resources

About

The transverse Ising model: a guide for combined modalities of hyperthermia and imaging

Cited by 7 publications

References 21 publications

Investigation of the bipolar effect in the thermoelectric material CaMg2Bi2 using a first-principles study

Investigation of the bipolar effect in the thermoelectric material CaMg2Bi2 using a first-principles study

Tuning the carrier concentration using Zintl chemistry in Mg3Sb2, and its implications for thermoelectric figure-of-merit

Synthesis, characterization and biocompatibility of chitosan functionalized superparamagnetic nanoparticles for heat activated curing of cancer cells

Contact Info

Product

Resources

About

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Investigation of the bipolar effect in the thermoelectric material CaMg₂Bi₂ using a first-principles study

Tuning the carrier concentration using Zintl chemistry in Mg₃Sb₂, and its implications for thermoelectric figure-of-merit