scholarly journals Glassy dynamics of poly(2-vinyl-pyridine) brushes with varying grafting density

Soft Matter ◽  
2015 ◽  
Vol 11 (15) ◽  
pp. 3062-3066 ◽  
Author(s):  
Nils Neubauer ◽  
René Winkler ◽  
Martin Tress ◽  
Petra Uhlmann ◽  
Martin Reiche ◽  
...  
Keyword(s):  
Glass Transition ◽  
Dielectric Spectroscopy ◽  
Glassy Dynamics ◽  
Segmental Dynamics ◽  
Broadband Dielectric Spectroscopy ◽  
Nanostructured Silicon ◽  
Grafting Density ◽  
Vinyl Pyridine

By using Broadband Dielectric Spectroscopy with nanostructured silicon electrodes we found that the segmental dynamics (dynamic glass transition) of a series of P2VP brushes is bulk-like.

Multiple glassy dynamics in dipole functionalized triphenylene-based discotic liquid crystals revealed by broadband dielectric spectroscopy and advanced calorimetry – assessment of the molecular origin

2019 ◽  
Vol 21 (33) ◽  
pp. 18265-18277 ◽  
Author(s):  
Arda Yildirim ◽  
Andrea Bühlmeyer ◽  
Shunsuke Hayashi ◽  
Johannes Christian Haenle ◽  
Kathrin Sentker ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Liquid Crystals ◽  
Phase Behavior ◽  
Dielectric Spectroscopy ◽  
Discotic Liquid Crystals ◽  
Glassy Dynamics ◽  
Broadband Dielectric Spectroscopy ◽  
Molecular Origin

A selected series of dipole functionalized triphenylene-based discotic liquid crystals (DLCs) was synthesized and investigated in a systematic way to reveal the phase behavior and molecular dynamics.

Relationship between global and segmental dynamics of poly(butylene oxide) studied by broadband dielectric spectroscopy

2018 ◽  
Vol 148 (3) ◽  
pp. 034904 ◽  
Author(s):  
Osamu Urakawa ◽  
Minoru Yamane ◽  
Shota Tomie ◽  
Tadashi Inoue ◽  
Toshiyuki Shikata ◽  
...  
Keyword(s):  
Dielectric Spectroscopy ◽  
Segmental Dynamics ◽  
Broadband Dielectric Spectroscopy

scholarly journals Dynamics of aqueous peptide solutions in folded and disordered states examined by dynamic light scattering and dielectric spectroscopy

2021 ◽  
Author(s):  
Jorge Humberto Melillo ◽  
Jan Gabriel ◽  
Florian Pabst ◽  
Thomas Blochowicz ◽  
Silvina Cerveny
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Dielectric Spectroscopy ◽  
Intrinsically Disordered Proteins ◽  
Disordered Proteins ◽  
Segmental Dynamics ◽  
Intrinsically Disordered ◽  
Broadband Dielectric Spectroscopy ◽  
Combining Data

Characterizing the segmental dynamics of proteins, and intrinsically disordered proteins in particular, is a challenge in biophysics. In this study, by combining data from broadband dielectric spectroscopy (BDS) and both...

Site-Dependent Segmental Dynamics Revealed Using Broadband Dielectric Spectroscopy on Well-Defined Functionalized Polystyrenes

2011 ◽  
Vol 44 (19) ◽  
pp. 7810-7819 ◽  
Author(s):  
Sandra Plaza-García ◽  
Reidar Lund ◽  
Angel Alegría ◽  
Juan Colmenero ◽  
Jonathan Janoski ◽  
...  
Keyword(s):  
Dielectric Spectroscopy ◽  
Segmental Dynamics ◽  
Broadband Dielectric Spectroscopy

scholarly journals Dynamics of poly(vinyl butyral) studied using dielectric spectroscopy and 1H NMR relaxometry

2017 ◽  
Vol 19 (47) ◽  
pp. 31804-31812 ◽  
Author(s):  
Silvia Pizzanelli ◽  
Daniele Prevosto ◽  
Massimiliano Labardi ◽  
Tommaso Guazzini ◽  
Simona Bronco ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
1H Nmr ◽  
Dielectric Spectroscopy ◽  
Segmental Dynamics ◽  
Nmr Relaxometry ◽  
Vinyl Butyral ◽  
1H Nmr Relaxometry

Dielectric spectroscopy and NMR relaxometry unveiled the PVB segmental dynamics across the glass transition temperature.

scholarly journals Kinetically controlled glass transition measurement of organic aerosol thin films using broadband dielectric spectroscopy

2018 ◽  
Vol 11 (6) ◽  
pp. 3479-3490 ◽  
Author(s):  
Yue Zhang ◽  
Shachi Katira ◽  
Andrew Lee ◽  
Andrew T. Lambe ◽  
Timothy B. Onasch ◽  
...  
Keyword(s):  
Glass Transition ◽  
Dielectric Spectroscopy ◽  
Organic Aerosols ◽  
Transition Temperatures ◽  
Glass Transitions ◽  
Relaxation Rates ◽  
Heating Rates ◽  
Glass Transition Temperatures ◽  
Broadband Dielectric Spectroscopy ◽  
Kinetically Controlled

Abstract. Glass transitions from liquid to semi-solid and solid phase states have important implications for reactivity, growth, and cloud-forming (cloud condensation nuclei and ice nucleation) capabilities of secondary organic aerosols (SOAs). The small size and relatively low mass concentration of SOAs in the atmosphere make it difficult to measure atmospheric SOA glass transitions using conventional methods. To circumvent these difficulties, we have adapted a new technique for measuring glass-forming properties of atmospherically relevant organic aerosols. Aerosol particles to be studied are deposited in the form of a thin film onto an interdigitated electrode (IDE) using electrostatic precipitation. Dielectric spectroscopy provides dipole relaxation rates for organic aerosols as a function of temperature (373 to 233 K) that are used to calculate the glass transition temperatures for several cooling or heating rates. IDE-enabled broadband dielectric spectroscopy (BDS) was successfully used to measure the kinetically controlled glass transition temperatures of aerosols consisting of glycerol and four other compounds with selected cooling and heating rates. The glass transition results agree well with available literature data for these five compounds. The results indicate that the IDE-BDS method can provide accurate glass transition data for organic aerosols under atmospheric conditions. The BDS data obtained with the IDE-BDS technique can be used to characterize glass transitions for both simulated and ambient organic aerosols and to model their climate effects.

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