An advanced structural characterization of templated meso-macroporous carbon monoliths by small- and wide-angle scattering techniques

• Felix M. Badaczewski,
• Marc O. Loeh,
• Torben Pfaff,
• Dirk Wallacher,
• Daniel Clemens and
• Bernd M. Smarsly

Beilstein J. Nanotechnol. 2020, 11, 310–322, doi:10.3762/bjnano.11.23

• templates were infiltrated by two different carbon precursors, namely a mesophase pitch and a formaldehyde resole. The template was removed with hydrofluoric acid. Further information can be found in a recent study [41]. SANS data with a very good signal-to-noise ratio were acquired utilizing the V16

pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

• Emilie Molina,
• Mélody Mathonnat,
• Jason Richard,
• Patrick Lacroix-Desmazes,
• Martin In,
• Philippe Dieudonné,
• Thomas Cacciaguerra,
• Corine Gérardin and
• Nathalie Marcotte

Beilstein J. Nanotechnol. 2019, 10, 144–156, doi:10.3762/bjnano.10.14

• assembly. The pH-dependent mesoproperties of the PEO-b-PAA/OC PIC structuring agent can be depicted by defining an induced amphiphilic unit that determines the nature of the mesophase. This amphiphilic unit can be described as a ternary system constituted of OC, PEO-b-PAA and silica species. The core of

Induced smectic phase in binary mixtures of twist-bend nematogens

• Anamarija Knežević,
• Irena Dokli,
• Marin Sapunar,
• Suzana Šegota,
• Ute Baumeister and
• Andreja Lesac

Beilstein J. Nanotechnol. 2018, 9, 1297–1307, doi:10.3762/bjnano.9.122

• ]. Apart from shifting the phase transition temperatures in the mixtures of two LC compounds, the formation of a new mesophase is also an interesting phenomenon. The first induced mesophase was discovered in binary rod-like nematic liquid crystal mixtures of N-(p-methoxybenzylidene)-p-n-butylaniline (MBBA

• File 1). This is in line with an intercalated smectic C phase. Given that the mesophase exhibits a schlieren texture with both 2- and 4-brush defects it is concluded that the phase is an anticlinic smectic C (SmCA) type. The induced smectic phase is most stable in the mixture containing roughly 70 mol

• near the spacer (Figure 10a). Since void space in molecular packing is unacceptable for condensed mesophase formation [52][53] it is reasonable to expect destabilization of the SmCA phase. Indeed, only the Iso–N–NTB phase sequence was observed for the pure BB. In the BB–CBI mixtures, introduction of

Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant

• Sergey A. Shvetsov,
• Alexander V. Emelyanenko,
• Natalia I. Boiko,
• Alexander S. Zolot'ko,
• Yan-Song Zhang,
• Jui-Hsiang Liu and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2018, 9, 870–879, doi:10.3762/bjnano.9.81

• structures. Among the variety of different materials containing azobenzene derivatives, there is special interest in host–guest systems consisting of a mesophase matrix and a small concentration (<1 wt %) of dopant. In particular, they reveal higher optical nonlinear response [14][21]. Some kinds of the

Synthesis and characterization of two new TiO₂-containing benzothiazole-based imine composites for organic device applications

• Anna Różycka,
• Agnieszka Iwan,
• Krzysztof Artur Bogdanowicz,
• Michal Filapek,
• Natalia Górska,
• Damian Pociecha,
• Marek Malinowski,
• Patryk Fryń,
• Agnieszka Hreniak,
• Jakub Rysz,
• Paweł Dąbczyński and
• Monika Marzec

Beilstein J. Nanotechnol. 2018, 9, 721–739, doi:10.3762/bjnano.9.67

• synthesized compounds – aromatic Schiff bases – are known as thermally stable, and second, thanks to the plane structure, they will tend to adopt a column-like structure. In the case of the asymmetric molecule (SP2), it was expected to obtain a columnar structure in low-ordered mesophase, such as a nematic

Liquid-crystalline nanoarchitectures for tissue engineering

• Baeckkyoung Sung and
• Min-Ho Kim

Beilstein J. Nanotechnol. 2018, 9, 205–215, doi:10.3762/bjnano.9.22

• challenges for applying LC nanoarchitectures in tissue engineering fields is discussed. Keywords: biocolloid; biopolymer; cell-matrix interaction; mesophase; regenerative medicine; Review Introduction Liquid crystals (LCs) are ubiquitous in our life [1]. On one hand, LC materials play a central role in

• their complex geometries of DNA molecules have been thoroughly explored by Livolant and colleagues [30][31]. As the DNA concentration increases, the mesophase of DNA molecules transits from the isotropic phase, blue phase or precholesteric phase (below 160 mg/mL), cholesteric phase (160–380 mg/mL), and

• phase or in a 3D orthorhombic phase. Examples of bioengineered materials displaying LC phases DNA is one of the most frequently used biomolecules in the field of biomedical engineering and bioinspired technology [35]. The DNA mesophase has been exploited for several applications, including biosensors

Dielectric properties of a bisimidazolium salt with dodecyl sulfate anion doped with carbon nanotubes

• Doina Manaila Maximean,
• Viorel Cîrcu and
• Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 164–174, doi:10.3762/bjnano.9.19

• pure and CNT-doped ILC were recorded in the frequency range from 10−1 to 107 Hz and in the temperature range from 293 to 338 K corresponding to the different phases of the ILC (mesophase and isotropic state). The values of the permittivity, dielectric loss and conductivity were deduced from the

• corresponding temperatures together with the enthalpy values associated to these processes are presented in Figure 3. The transitions of [bisC8ImC10][C12H25OSO3]2 between mesophase and isotropic state observed by DSC are broad, with Tonset = 321.15 K. The temperature range of the liquid crystalline phase is

• measurements. The XRD measurements were performed at 298 K after the sample was previously heated at 333 K to reach the isotropic state and then cooled down to room temperature in the mesophase temperature domain. The results are presented in Figure 4. The XRD pattern of [bisC8ImC10][C12H25OSO3]2 salt shows

Preparation and characterization of polycarbonate/multiwalled carbon nanotube nanocomposites

• Claudio Larosa,
• Niranjan Patra,
• Marco Salerno,
• Lara Mikac,
• Remo Merijs Meri and
• Mile Ivanda

Beilstein J. Nanotechnol. 2017, 8, 2026–2031, doi:10.3762/bjnano.8.203

• appearing in the cooling cycle could be due to the enthalpy relaxation or mesophase transitions. The glass transition observed in the cooling cycle is 9 °C less than the heating cycle. Conclusion PC/MWCNTs composites were prepared as transparent films. The presence of a dispersed, uniform phase in the

Dimer/tetramer motifs determine amphiphilic hydrazine fibril structures on graphite

• Loji K. Thomas,
• Nadine Diek,
• Uwe Beginn and
• Michael Reichling

Beilstein J. Nanotechnol. 2012, 3, 658–666, doi:10.3762/bjnano.3.75

• different from known mesophase bulk structures. The structures are described by building-block models based on hydrogen-bonded dimer and tetramer precursors of hydrazines. The closure and growth in length of building units into fibrils takes place through van der Waals forces acting between the dangling

• directed to the centre; for example, six such wedge pieces may lead to a hexagonal columnar mesophase. Further stacking of discs in a face-to-face configuration leads to columns [6][12][13]. To evaluate the possibilities of self-assembly of 2CHd-10 and 1CHn-10 molecules on HOPG, we note that their amide

• -2 form crystalline compounds that melt above 177 °C, while 3CHd with longer chains as well as 2CHd-10 form a columnar, hexagonal, disordered (Chd) mesophase in the bulk [6]. AFM images in Figure 2 show the morphology of 2CHd-10 and 1CHn-10 on HOPG after deposition from high-concentration solutions

FTIR nanobiosensors for Escherichia coli detection

• Stefania Mura,
• Gianfranco Greppi,
• Maria Laura Marongiu,
• Pier Paolo Roggero,
• Sandeep P. Ravindranath,
• Lisa J. Mauer,
• Nicoletta Schibeci,
• Francesco Perria,
• Massimo Piccinini,
• Plinio Innocenzi and
• Joseph Irudayaraj

Beilstein J. Nanotechnol. 2012, 3, 485–492, doi:10.3762/bjnano.3.55

• ). Films were deposited with a dip coater, aged at room temperature (RH 50% for 24 h) and, to increase the inorganic polycondensation and stabilize the mesophase, the films were submitted to different firing steps at 60, 120 and 200 °C for 24 h at each temperature in an oven at a heating rate of 10 °C·min