A Chiroptical Logic Circuit Based on Self-Assembled Soft Materials Containing Amphiphilic Spiropyran

2015 ◽  
Vol 28 (8) ◽  
pp. 1644-1649 ◽  
Author(s):  
Changxia Liu ◽  
Dong Yang ◽  
Qingxian Jin ◽  
Li Zhang ◽  
Minghua Liu
Keyword(s):  
Soft Materials ◽  
Logic Circuit ◽  
Self Assembled

ChemInform Abstract: Functional Soft Materials: Nanostructured Liquid Crystals and Self-Assembled Fibrous Aggregates

ChemInform ◽  
2011 ◽  
Vol 42 (16) ◽  
pp. no-no
Author(s):  
Takashi Kato ◽  
Yoshiko Shoji ◽  
Masafumi Yoshio ◽  
Shogo Yamane ◽  
Takuma Yasuda
Keyword(s):  
Liquid Crystals ◽  
Soft Materials ◽  
Self Assembled

Primary ion fluence dependence in time-of-flight SIMS of a self-assembled monolayer of octadecylphosphonic acid molecules on mica discussion of static limit

2007 ◽  
Vol 85 (12) ◽  
pp. 1075-1082 ◽  
Author(s):  
M Nieradko ◽  
N W Ghonaim ◽  
L Xi ◽  
H Y Nie ◽  
J Francis ◽  
...  
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Time Of Flight ◽  
Static Condition ◽  
Soft Materials ◽  
Self Assembled Monolayer ◽  
Atomic Ions ◽  
Tof Sims ◽  
Self Assembled ◽  
Octadecylphosphonic Acid ◽  
Fluence Range

By using a self-assembled monolayer of octadecylphosphonic acid molecules, CH3(CH2)17PO(OH)2, on mica as a model of the “soft” materials, such as self-assembled monolayers (SAMs) and multilayers in many biological systems as well as artificially engineered molecular electronic systems, we have examined the effects of primary ion fluence on time-of-flight secondary ion mass spectrometry (TOF-SIMS) of the technologically important model. Our measurements clearly show that although the intensity per unit primary ion fluence of most atomic ions and many small fragment ions do not vary by more than 10% for the fluence range of 1010–1013 cm–2, the intensity of the parent molecular ion can drop by two orders of magnitude in this fluence range. While the changes are different for the primary ion beams of Bi3+ (25 keV, 45°), Bi+ (25 keV, 45°), and Ar+ (8 keV, 45°), they are all substantial, with the damage cross section induced by the Bi3+ beam being the largest (6 000 Å2). Since different secondary ions have quite different intensity changes, the analytical results derived from TOF-SIMS can vary significantly by the time and duration of the measurements in the TOF-SIMS experiment. Therefore, our results suggest that for TOF-SIMS of molecular layers such as SAMs, the primary ion fluence condition should be recorded and reported. In general, the validity of the static condition becomes questionable when the cumulative primary ion fluence exceeds 1 × 1011 cm–2.Key words: SIMS, static SIMS, TOF-SIMS, soft materials, self-assembled monolayer, bilayer, surface of biological materials.

scholarly journals Phospholes: Molecular Engineering of “Click”-Phospholes Towards Self-Assembled Luminescent Soft Materials (Adv. Funct. Mater. 7/2014)

2014 ◽  
Vol 24 (7) ◽  
pp. 877-877 ◽  
Author(s):  
Xiaoming He ◽  
Jian-Bin Lin ◽  
Wang Hay Kan ◽  
Pengcheng Dong ◽  
Simon Trudel ◽  
...  
Keyword(s):  
Soft Materials ◽  
Molecular Engineering ◽  
Self Assembled

scholarly journals Multi-component, Self-assembled, Functional Soft Materials

2013 ◽  
Vol 67 (1) ◽  
pp. 44-50 ◽  
Author(s):  
V. S. Sajisha ◽  
Uday Maitra
Keyword(s):  
Soft Materials ◽  
Self Assembled

scholarly journals Geometry induced sequence of nanoscale Frank–Kasper and quasicrystal mesophases in giant surfactants

2016 ◽  
Vol 113 (50) ◽  
pp. 14195-14200 ◽  
Author(s):  
Kan Yue ◽  
Mingjun Huang ◽  
Ryan L. Marson ◽  
Jinlin He ◽  
Jiahao Huang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Brownian Dynamics ◽  
Molecular Model ◽  
Critical Role ◽  
Sphere Packing ◽  
Molecular Geometry ◽  
Soft Materials ◽  
Real Space ◽  
Molecular Architecture ◽  
Self Assembled

Frank–Kasper (F-K) and quasicrystal phases were originally identified in metal alloys and only sporadically reported in soft materials. These unconventional sphere-packing schemes open up possibilities to design materials with different properties. The challenge in soft materials is how to correlate complex phases built from spheres with the tunable parameters of chemical composition and molecular architecture. Here, we report a complete sequence of various highly ordered mesophases by the self-assembly of specifically designed and synthesized giant surfactants, which are conjugates of hydrophilic polyhedral oligomeric silsesquioxane cages tethered with hydrophobic polystyrene tails. We show that the occurrence of these mesophases results from nanophase separation between the heads and tails and thus is critically dependent on molecular geometry. Variations in molecular geometry achieved by changing the number of tails from one to four not only shift compositional phase boundaries but also stabilize F-K and quasicrystal phases in regions where simple phases of spheroidal micelles are typically observed. These complex self-assembled nanostructures have been identified by combining X-ray scattering techniques and real-space electron microscopy images. Brownian dynamics simulations based on a simplified molecular model confirm the architecture-induced sequence of phases. Our results demonstrate the critical role of molecular architecture in dictating the formation of supramolecular crystals with “soft” spheroidal motifs and provide guidelines to the design of unconventional self-assembled nanostructures.

Nanoscale metallogel via self-assembly of self-assembled trinuclear coordination rings: multi-stimuli-responsive soft materials

2015 ◽  
Vol 44 (34) ◽  
pp. 15181-15188 ◽  
Author(s):  
Sudhakar Ganta ◽  
Dillip Kumar Chand
Keyword(s):  
Self Assembly ◽  
Soft Materials ◽  
The Self ◽  
Stimuli Responsive ◽  
Self Assembled

A multi-stimuli-responsive metallogel is obtained by the self-assembly of an already self-assembled trinuclear palladium(ii) based coordination ring of the rare M3L6 composition.

Low-Voltage InGaZnO Thin-Film Transistors Gated by SiO2 Proton Conducting Films

2014 ◽  
Vol 1033-1034 ◽  
pp. 1176-1181
Author(s):  
Rui Chao Liu ◽  
Hong Liang Zhang ◽  
Run Yuan Li
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Field Effect ◽  
High Performance ◽  
Low Voltage ◽  
Logic Circuit ◽  
Proton Conducting ◽  
Large Current ◽  
Effect Transistor ◽  
Self Assembled

Low-voltage (1.5 V) InGaZnO (IGZO) thin-film transistors (TFTs) gated by the SiO2 proton conducting films were self-assembled by a gradient shadow mask in sputtered self-assembled IGZO channel process. The IGZO TFTs have a high-performance with a large current on/off ratio of ≥1.2×106, a low subthreshold swing of ≤120 mV/decade and a high field-effect mobility of 2.2 ~ 6.9 cm2/V·s. Threshold voltage is tuned by various thicknesses of IGZO channel. Both depletion mode and enhancement mode on the same chip is obtained, which will implement a direct-coupled field-effect transistor logic circuit. Our results demonstrate that the IGZO TFTs are promising logic circuit candidates for portable low-voltage oxide-based devices.

scholarly journals Peptide foldamer-based self-assembled nanostructures containing cyclic beta-amino acids

Nanoscale ◽  
2021 ◽  
Author(s):  
Monika Szefczyk
Keyword(s):  
Amino Acids ◽  
Biomedical Applications ◽  
Soft Materials ◽  
Responsive Materials ◽  
Material Sciences ◽  
Self Assembled

Peptide soft materials belong to an emerging branch of material sciences due to their growing importance as responsive materials in diagnostics, therapeutics and biomedical applications. The diversity provided by the...

scholarly journals Soft self-assembly of Weyl materials for light and sound

2018 ◽  
Vol 115 (16) ◽  
pp. E3655-E3664 ◽  
Author(s):  
Michel Fruchart ◽  
Seung-Yeol Jeon ◽  
Kahyun Hur ◽  
Vadim Cheianov ◽  
Ulrich Wiesner ◽  
...  
Keyword(s):  
Self Assembly ◽  
Surface States ◽  
Material Design ◽  
Soft Materials ◽  
General Symmetry ◽  
Mesostructured Materials ◽  
Reversal Invariance ◽  
Symmetry Constraints ◽  
Topological Surface ◽  
Self Assembled

Soft materials can self-assemble into highly structured phases that replicate at the mesoscopic scale the symmetry of atomic crystals. As such, they offer an unparalleled platform to design mesostructured materials for light and sound. Here, we present a bottom-up approach based on self-assembly to engineer 3D photonic and phononic crystals with topologically protected Weyl points. In addition to angular and frequency selectivity of their bulk optical response, Weyl materials are endowed with topological surface states, which allow for the existence of one-way channels, even in the presence of time-reversal invariance. Using a combination of group-theoretical methods and numerical simulations, we identify the general symmetry constraints that a self-assembled structure has to satisfy to host Weyl points and describe how to achieve such constraints using a symmetry-driven pipeline for self-assembled material design and discovery. We illustrate our general approach using block copolymer self-assembly as a model system.

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