Multiscale phenomena in molecular matter

Session

Soft Matter

4 Jul 2017, 11:30

Conveners

Soft Matter

• Simone Capaccioli (Physics Department University of Pisa)

24. Multi-scale investigation of MgO-based cements by NMR spectroscopy and relaxometry

Dr Lucia Calucci (ICCOM-CNR)

04/07/2017, 11:30

Miscellany (biologically oriented systems, new ideas, advanced methods,...)

oral presentation

`In the last years, MgO-based cementitious materials have attracted great interest as eco-sustainable alternatives to traditional Portland (CaO-based) cement, the dominant form of cement used worldwide. In particular, MgO-based formulations have been proposed with the aim of both reducing the environmental footprint associated with the production of Portland cement and developing cements to be...

33. Reentrant phenomenon and odd-even effect in homologous binary system of 4‑alkyl-4’-cyanobiphenyl ($n$CB)

Dr Yasuhisa Yamamura (University of Tsukuba)

04/07/2017, 12:00

Soft matter and glass formers

oral presentation

`A family of 4-alkyl-4’-cyanobiphenyl ($n$CB, $n$ is the number of carbon atoms in the alkyl chain) is one of the most famous mesogenic series of calamitic molecules. The $n$CBs exhibit liquid crystalline phases, nematic (N) and smectic A${}_{\mathrm{d}}$ (SmA${}_{\mathrm{d}}$, d means dimer) phases, below the isotropic liquid (IL) depending on the length $n$ of the alkyl chain. Although a huge number...

63. Helical structure of liquid crystals tested by spectroscopy methods

Mrs Marzena Tykarska (Military Univesity of Technology)

04/07/2017, 12:30

Soft matter and glass formers

oral presentation

`Chiral liquid crystals form macroscopic helicoidal structure. It is characterized by two parameters: the value of helical pitch and the helical twist sense (handedness). Spectroscopy methods let measure both of these parameters. The helical pitch can be measured actually by different methods, but the most popular method uses UV-Vis-IRspectrophotometers. The idea of measurement is based on the...

48. Scaling of the dielectric response of supercooled disordered phases

Dr Miroslaw Galazka (Institute of Nuclear Physics Polish Academy of Sciences)

04/07/2017, 13:00

Soft matter and glass formers

oral presentation

`Spectrum of a dielectric permittivity for supercooled disordered phases most often is composed of two relaxation processes [1]: a main relaxation process (called $\alpha$ process) followed by resolved, unresolved (also called ‘excess wing phenomena’), or both secondary processes ($\beta$ processes). Although there are many models describing dielectric relaxation [2-6] none of them describes...

30. Cold crystallization and glass transitions in 4CFPB liquid crystal

Dr Tomasz Rozwadowski (The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland)

04/07/2017, 13:20

Soft matter and glass formers

oral presentation

`Presented research concerns the investigations of vitrification and crystallization processes in 4CFPB (4-cyano-3-fluorophenyl 4-butylbenzoate) liquid crystalline substance. Glass transition is important issue in new-day condensed matter physics. Additionally, cold crystallization phenomenon is also interesting case, especially in connection to glass formation tendency. Descriptions of both...