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Incorporation of carbon nanotubes (CNT) into liquid crystalline (LC) phases of cellulose nanostructures (CNCs) may be used for preparation of hybrids with novel optical, electrical and mechanical properties. Here we investigated the effect of nanoparticle diameter, geometry, aspect ratio and flexibility on the exclusion of dispersed carbon nanostructures (CNS) from the chiral nematic phase (N*) of the CNCs. While CNS are nicely dispersed in isotropic suspensions of CNS, we observe that fullerenes, carbon black and CNT are depleted from the N* phase. This observation is surprising as theoretical predictions and previous observations of nanoparticles indicate that nanometric inclusions would be incorporated within the N* phase. Cryo-TEM imaging reveal that the dispersed CNS induce miss- orientation of the CNCs irrespective of their geometry and size. Rheological measurements suggest that about 10% of the CNCs are affected by the CNS. The multi-particle nature of the interaction may be the origin of the non-size selective exclusion of the CNS. Re-entrant behavior is observed at high CNCs concentrations (about 13 wt%) where a (nematic) gel-like phase kinetically traps the CNS. These phases exhibit non-Newtonian flow behavior, and birefringence, offering a pathway for preparation of non-isotropic CNCs-CNTs composites and thin films via liquid processing.
This article was published in the following journal.
Name: The journal of physical chemistry. B
DNA origami nanostructures hold an immense potential to be used for biological and medical applications. However, low-salt conditions and nucleases in physiological fluids induce denaturation and degr...
AlGaN nanostructures have many applications because of theirs interesting and unique properties. Here we report a simple fabrication of AlGaN nanostructures by nanolithography on ultraviolet (UV) LEDs...
Engineering the morphology and structure of low-dimensional carbon nanomaterials is important to study their mechanical and electrical properties and even superconductivity. Herein, first the techniqu...
Nanostructures and nanomaterials based on peptide self-assembly have attracted tremendous interests due to the functionalities of peptide molecules. Furthermore, the self-assembled peptide nanostructu...
DNA origami nanotechnology is increasingly used to mimic membrane-associated biophysical phenomena. Although a variety of DNA origami nanostructures has already been produced to target lipid membranes...
The purpose of this study is to investigate the bioequivalence after administration of HIP1403 and HGP0919 suspensions in healthy male volunteers.
This is a Phase 3, multi-center, randomized, placebo-controlled trial to determine the effectiveness and safety of the 6% cellulose sulfate (CS) vaginal gel for the prevention of HIV infec...
Prospective, non-randomized trial to evaluate the safety and efficacy of the LAA Exclusion Device (Clip) for the exclusion of the LAA via epicardial tissue approximation.
In post-dilution haemodiafiltration only synthetic membranes have been used to date. The allergy problems described with these membranes require the development of other membranes capable...
The purpose of this study is to evaluate the safety and tolerability of two carbon monoxide doses when administered as an inhaled gas for 1 hour in patients receiving kidney transplants.
Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.
The branch of medicine concerned with the application of NANOTECHNOLOGY to the prevention and treatment of disease. It involves the monitoring, repair, construction, and control of human biological systems at the molecular level, using engineered nanodevices and NANOSTRUCTURES. (From Freitas Jr., Nanomedicine, vol 1, 1999).
A technique for detecting short-lived reactive FREE RADICALS in biological systems by providing a nitrone or nitrose compound for an addition reaction to occur which produces an ELECTRON SPIN RESONANCE SPECTROSCOPY-detectable aminoxyl radical. In spin trapping, the compound trapping the radical is called the spin trap and the addition product of the radical is identified as the spin adduct. (Free Rad Res Comm 1990;9(3-6):163)
A type of ion exchange chromatography using diethylaminoethyl cellulose (DEAE-CELLULOSE) as a positively charged resin. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Colloids with liquid continuous phase and solid dispersed phase; the term is used loosely also for solid-in-gas (AEROSOLS) and other colloidal systems; water-insoluble drugs may be given as suspensions.
Neurology - Central Nervous System (CNS)
Alzheimer's Disease Anesthesia Anxiety Disorders Autism Bipolar Disorders Dementia Epilepsy Multiple Sclerosis (MS) Neurology Pain Parkinson's Disease Sleep Disorders Neurology is the branch of me...