Topical curcumin shows poor local availability because of its low aqueous solubility and inadequate tissue absorption. Curcumin nanocrystals were prepared by sonoprecipitation followed lyophilization to improve surface area solubility. The formulation was optimized the Design Experiment (DoE) approach. characterized for particle size, zeta potential, polydispersity index, scanning electron micr...

The charge retention characteristics of metal nanocrystal (MNC) and semiconductor nanocrystal (SNC) memory devices are comparatively studied in this paper. A charge retention model is proposed, taking into account the quantum confinement effect, to account for the better retention characteristics of metal nanocrystal memory observed in the experiment. Simulation results are in good agreement wi...

This paper describes the in situ synthesis of single fluorescence carbon nanoparticles (FCNs) for target bioimaging applications derived from biocompatible hyaluronic acid (HA) without using common conjugation processes. FCNs formed via the dehydration of hyaluronic acid, which were obtained by carbonizing HA, and partially carbonized HA fluorescence carbon nanoparticles (HA-FCNs), formed by a ...

Colloidal carbon spheres were synthesized by the carbonization of squalane, a nonvolatile hydrocarbon solvent, in supercritical carbon dioxide. Precise pressure modulation of the fluid medium led to size controlled growth of carbon spheres ranging from 300 to 1500 nm in diameter. This unique synthetic approach of carbonizing a hydrocarbon suspension in supercritical fluid is found to suppress a...

Improving devices incorporating solution-processed nanocrystal-based semiconductors requires a better understanding of charge transport in these complex, inorganic-organic materials. Here we perform a systematic study on PbS nanocrystal-based diodes using temperature-dependent current-voltage characterization and thermal admittance spectroscopy to develop a model for charge transport that is ap...

Small molecules with functional groups can show different electron affinity and binding behavior on nanocrystal surface, which in principle could be used to alternate the electrical transport in self-assembled nanocrystal thin films. These small molecules can also serve for scattering the phonons to reduce the thermal conductivity. Here, we present our research on the thermoelectric characteris...

T he properties of materials often change drastically when their size is decreased to the nanometre range. For example, as the surface-to-volume ratio of a material is increased, typically its melting temperature depresses and its chemical reactivity tends to increase. Also, as the size of a crystal shrinks down to submicrometre sizes, it becomes more difficult to deform it plastically (that is...

................................................................................................................................................ 2 INTRODUCTION ....................................................................................................................................... 4 MOTIVATION: THE CLEAN ENERGY CHALLENGE ...............................................................

We present a Monte Carlo simulation and modelling method for single-electron nanocrystal memories including the nanocrystal inter-dot effect. A nanocrystal memory is modelled as a network of modified single-tunnel junctions for its programme operation and as a network of channel resistances for simulating drain current to extract its threshold voltage. Additionally, in each modelling, capacitiv...