Frequency Dependent Charge Transport and Spin State Switching Characteristics of Fe(phen)₂(NCS)₂ in Polymer.

We report on the bistability in spin states of spin crossover (SCO) compound Fe(phen)₂(NCS)₂ in polymer (polypyrrole) by frequency (1-100 kHz) and temperature dependent (305-457 K) electrical conductivity measurements. The structure and growth of SCO compounds in conducting polymer are obtained by scanning electron microscopy, X-ray diffraction and optical absorption measurements. The thermal dependence of ac conductivity () shows the clear formation of a hysteresis loop in its cooling and heating cycle due to the difference in conductivity in high spin and low spin state.

Probing Spin-State Switching in Fe(phen)₂(NCS)₂ Thin Film Nanocrystals on Different Substrates by Electrical Conductivity Measurements.

Spin-state switching mechanism is investigated by measuring the temperature of the electrical conductivity of spin crossover (SCO) material Fe(phen)2(NCS)2 thin films grown on glass, quartz and silicon substrates. The morphology characterized by scanning electron microscopy, clearly reveals the growth of thin films of thickness ~300 nm comprising of nanocrystals, size and distribution of which is dependent on the nature of substrates. The film on quartz is found to have the most uniform growth of nanocrystals of size ~22 nm with a homogeneous distribution.

Prescribing patterns of medicines in chronic kidney disease patients on maintenance hemodialysis.

Objectives: To study medicine prescribing pattern for chronic kidney disease (CKD) patients on maintenance hemodialysis.

Materials And Methods: This prospective observational study was conducted in hemodialysis unit of a teaching hospital with adult CKD patients on maintenance hemodialysis. Patients' clinical profile, drug-use pattern, and medication-related problem data were captured in a structured case report form and the data were analyzed descriptively.

Sensory cutaneous nerve fine-needle aspiration in Hansen's disease: A retrospective analysis of our experience.

Background: Leprosy affects peripheral nerves. As Mycobacterium leprae has unique tropism for Schwann cells, thickened sensory cutaneous nerves provide an easy target for the detection of lepra bacilli and other changes associated with the disease.

Materials And Methods: The data of patients with sensory cutaneous nerve involvement were retrieved from our record for the period January 2006 to December 2014.

Pronounced multiferroicity in oleic acid stabilized BiFeO3 nanocrystals at room temperature.

We report on the experimental observation of pronounced multiferroicity in BiFeO3 nanocrystals (size approximately 40 nm) at room temperature. Large scale BiFeO3 nanocrystals are synthesized using a low temperature chemical route and further stabilized with oleic acid. The nanocrystals exhibit a significant distortion in lattice parameter c compared to the bulk.

Ordered monomolecular layers as a template for the regular arrangement of gold nanoparticles.

Ordered arrays of metal nanoparticles are important for nanoelectronic and nanophotonic applications. Here, we report the formation of self-assembled arrays of gold nanoparticles on molecular layers of diacetylene compounds on a MoS2(0001) substrate. The arrangement of gold nanoparticles is observed using scanning tunneling microscopy.

Controlled chain polymerisation and chemical soldering for single-molecule electronics.

Single functional molecules offer great potential for the development of novel nanoelectronic devices with capabilities beyond today's silicon-based devices. To realise single-molecule electronics, the development of a viable method for connecting functional molecules to each other using single conductive polymer chains is required. The method of initiating chain polymerisation using the tip of a scanning tunnelling microscope (STM) is very useful for fabricating single conductive polymer chains at designated positions and thereby wiring single molecules.

Fabrication of luminescent silver doped PbS nanowires in polymer.

We report here fabrication of silver (0 to 1.76 mol%) doped PbS nanowires (radius r approximately 1.75 nm) in polymer by a simple wet chemical process.

High ferromagnetic transition temperature in PbS and PbS:Mn nanowires.

Spontaneous magnetization measured in the temperature range 5-300 K with high ferromagnetic transition temperature (T(c)) has been observed in both undoped and Mn doped (2-8 mol %) PbS nanowires (diameter 30 nm) in polymer. For undoped sample, we find T(c) ~ 290 K while for doped samples T(c) varies between 310-340 K depending on Mn concentrations. Both T(c) and coercive fields are critically dependent on Mn concentrations.

Chemical wiring and soldering toward all-molecule electronic circuitry.

Key to single-molecule electronics is connecting functional molecules to each other using conductive nanowires. This involves two issues: how to create conductive nanowires at designated positions, and how to ensure chemical bonding between the nanowires and functional molecules. Here, we present a novel method that solves both issues.

Rate-determining factors in the chain polymerization of molecules initiated by local single-molecule excitation.

Spontaneous chain polymerization of molecules initiated by a scanning tunneling microscope tip is studied with a focus on its rate-determining factors. Such chain polymerization that happens in self-assembled monolayers (SAM) of diacetylene compound molecules, which results in a π-conjugated linear polydiacetylene nanowire, varies in its rate P depending on domains in the SAM and substrate materials. While the arrangement of diacetylene molecules is identical in every domain on a graphite substrate, it varies in different domains on a MoS(2) substrate.

A Lupinoside prevented fatty acid induced inhibition of insulin sensitivity in 3T3 L1 adipocytes.

The decrease in insulin sensitivity to target tissues or insulin resistance leads to type 2 diabetes mellitus, an insidious disease threatening global health. Numerous evidences made free fatty acids (FFAs) responsible for insulin resistance and type 2 diabetes. We demonstrate here that the damage of insulin acitivity by a free fatty acid, palmitate could be prevented by a lupinoside.

Encapsulation of magnetic and fluorescent nanoparticles in emulsion droplets.

Oils containing both fluorescent semiconductor and magnetic oxide nanoparticles are used to produce oil in water emulsions. This technique produces oil droplets with homogeneous fluorescence and high magnetic nanoparticle concentrations. The optical properties of the oil droplets are studied as a function of the droplet sizes for various concentrations of fluorescent and magnetic nanoparticles.

Chlorogenic acid inhibits Bcr-Abl tyrosine kinase and triggers p38 mitogen-activated protein kinase-dependent apoptosis in chronic myelogenous leukemic cells.

We report that chlorogenic acid (Chl) induces apoptosis of several Bcr-Abl-positive chronic myelogenous leukemia (CML) cell lines and primary cells from CML patients in vitro and destroys Bcr-Abl-positive K562 cells in vivo. In contrast, this compound has no effect on the growth and viability of Bcr-Abl-negative lymphocytic and myeloid cell lines and primary CML cells. Sodium chlorogenate (NaChl) exhibits 2-fold higher efficiency in killing K562 cells compared with Chl.