Achieving High Dielectric Constant and Low Loss Property in a Dipolar Glass Polymer Containing Strongly Dipolar and Small-Sized Sulfone Groups

Wei, Junji; Zhang, Zhongbo; Tseng, Jung-Kai; Treufeld, Imre; Liu, Xiaobo; Litt, Morton H.; Zhu, Lei

doi:10.1021/am508488w

Cited by 161 publications

(213 citation statements)

References 45 publications

(89 reference statements)

Supporting

Mentioning

184

Contrasting

Unclassified

Order By: Relevance

“…The permanent electric dipole moment is closely related to the composite magnetic permeability and complex dielectric constant of materials (Equations 2–4 in SI), and could cause different f m values and absorption bandwidths56575859 as is the case in this study. With an increase in the amount of Co(III) doping, a right shift of f m occurred and the bandwidth of maximal microwave attenuation became significantly larger, albeit with a slight decrease of absorption performance.…”

Section: Resultsmentioning

confidence: 86%

Tunable high-performance microwave absorption for manganese dioxides by one-step Co doping modification

Xiao

et al. 2016

Sci Rep

View full text Add to dashboard Cite

The frequencies of microwave absorption can be affected by the permanent electric dipole moment which could be adjusted by modifying the crystal symmetry of the microwave absorbing materials. Herein, we corroborate this strategy experimentally and computationally to the microwave absorption of manganese dioxides. Nanosized Co-doped cryptomelane (Co-Cryp) was successfully synthesized by a one-step reaction. The introduction of Co(III) induced a change of crystal symmetry from tetragonal to monlclinic, which could lead to an increase of its permanent electric dipole moment. As a result, the frequencies of maximum microwave absorption were regulated in the range of 7.4 to 13.9 GHz with a broadened bandwidths. The results suggested that microwave absorption of manganese dioxides can be tailored with Co doping to expand their potential uses for abatement of various microwave pollutions.

show abstract

Section: Resultsmentioning

confidence: 86%

Tunable high-performance microwave absorption for manganese dioxides by one-step Co doping modification

Xiao

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The oxidation was complete and no further oxidation to sulfone occurred, as confirmed by the absence of the NMR peaks of methine protons next to a sulfone group at ~3.6 ppm. 45 …”

Section: Resultsmentioning

confidence: 99%

Biocompatible Polymeric Analogues of DMSO Prepared by Atom Transfer Radical Polymerization

Chung

Simakova

et al. 2017

Biomacromolecules

View full text Add to dashboard Cite

The synthesis of a sulfoxide-based water-soluble polymer, poly(2-(methylsulfinyl)ethyl acrylate) (polyMSEA), a polymeric analogue of DMSO, by atom transfer radical polymerization (ATRP) is reported. Well-defined linear polymers were synthesized using relatively low amounts of copper catalyst (1000 or 100 ppm). Two types of star polymers were synthesized by either an “arm-first” approach or a “core-first” approach using a biodegradable β-cyclodextrin core. The glass transition temperatures of both the linear polymer (16 °C) and star polymer (32 °C) were determined by differential scanning calorimetry (DSC). The lower critical solution temperature (LCST) of poly(MSEA) was estimated to be ca. 140 °C by extrapolating the LCST of a series of copolymers with NIPAM. Cytotoxicity tests revealed that both the linear and star polymers have low toxicity, even at concentrations up to 3 mg/mL.

show abstract

“…45 We synthesized PCBSF and fabricated devices with the different electrodes to investigate the dielectric properties imparted to small molecules by sulfones. In this case, devices with different electrodes gave significantly different numbers for ε r : 3.9 ± 0.1 using Al and 5.1 ± 0.1 using EGaIn.…”

Section: Resultsmentioning

confidence: 99%

Soft Nondamaging Contacts Formed from Eutectic Ga–In for the Accurate Determination of Dielectric Constants of Organic Materials

Douvogianni

Qiu

et al. 2018

Chem. Mater.

View full text Add to dashboard Cite

A method for accurately measuring the relative dielectric constant (εr) of thin films of soft, organic materials is described. The effects of the bombardment of these materials with hot Al atoms, the most commonly used top electrode, are mitigated by using electrodes fabricated from eutectic gallium–indium (EGaIn). The geometry of the electrode is defined by injection into microchannels to form stable structures that are nondamaging and that conform to the topology of the organic thin film. The εr of a series of references and new organic materials, polymers, and fullerene derivatives was derived from impedance spectroscopy measurements for both Al and EGaIn electrodes showing the specific limitations of Al with soft, organic materials and overcoming them with EGaIn to determine their dielectric properties and provide realistic values of εr.

show abstract

Achieving High Dielectric Constant and Low Loss Property in a Dipolar Glass Polymer Containing Strongly Dipolar and Small-Sized Sulfone Groups

Cited by 161 publications

References 45 publications

Tunable high-performance microwave absorption for manganese dioxides by one-step Co doping modification

Tunable high-performance microwave absorption for manganese dioxides by one-step Co doping modification

Biocompatible Polymeric Analogues of DMSO Prepared by Atom Transfer Radical Polymerization

Soft Nondamaging Contacts Formed from Eutectic Ga–In for the Accurate Determination of Dielectric Constants of Organic Materials

Contact Info

Product

Resources

About