Luminescent nanomaterials for developing high-contrast latent fingerprints.

Fingerprint patterns (or epidermal ridges) are by far one of the most reliable techniques for individual identification. Fingerprint patterns get deposited on all kinds of solid surfaces due to human transudation or exudation process. Bodily fluids through sweat glands contain moisture, natural oils and proteins.

SrAlO:Eu,Dy Long Afterglow Phosphor and Its Flexible Film for Optomechanical Sensing Application.

Mechanoluminescence is an unusual phenomenon in which a material emits electromagnetic radiation due to any deformation caused by mechanical force. In the present study, highly flexible mechanoluminescent films of SrAlO:Eu,Dy have been prepared by incorporating phosphor in a poly(vinyl alcohol) hydrogel using optimized ratios of dimethyl sulfoxide (DMSO):water as solvents. Upon introducing DMSO as a solvent along with water, flexibility and mechanical properties such as tear resistance and hardness of hydrogel were enhanced to a large extent.

Photothermal therapy using graphene quantum dots.

The rapid development of powerful anti-oncology medicines have been possible because of advances in nanomedicine. Photothermal therapy (PTT) is a type of treatment wherein nanomaterials absorb the laser energy and convert it into localized heat, thereby causing apoptosis and tumor eradication. PTT is more precise, less hazardous, and easy-to-control in comparison to other interventions such as chemotherapy, photodynamic therapy, and radiation therapy.

Review on long afterglow nanophosphors, their mechanism and its application in round-the-clock working photocatalysis.

Semiconductor assisted photocatalysis is one of the most efficient methods for the degradation of complex organic dyes. A major limiting factor of semiconductor assisted photocatalysis is the requirement of a continuous source of light to perform a redox reaction. One of the upcoming solutions is photon energy-storing long afterglow/persistent phosphors.

Red emitting CaTiO: Pr nanophosphors for rapid identification of high contrast latent fingerprints.

Red emitting (~612 nm) CaTiO:Pr long afterglow nanocrystals with a persistence time ~20 min (dark adapted human eyes) have been synthesised for developing high contrast latent fingerprints using the sol-gel process. Due to the persistent emission, CaTiO:Pr nanophosphor does not require a continuous source for excitation, thereby eliminating the background information even from multi-colour substrates, resulting in a high signal to noise ratio. As a consequence of which, minute features of level- I, II and III can be clearly studied in high contrast fingerprints.

Self-Activated Green-Yellow Emitting Gd₂CaZnO Phosphor for Efficient Ultra-Violet Light-Emitting Diodes.

A new self-activated green-yellow emitting Gd₂CaZnO (GCZO) phosphor was synthesized using solid-state reaction method at high-temperature. XRD analysis confirmed the orthorhombic structure of the sample with the Pbnm space group. SEM micrographs reveal the irregular morphology with micron sized particles.

The Impact of Progesterone Level on Day Of hCG Injection in IVF Cycles on Clinical Pregnancy Rate.

Background: Premature progesterone rise (PPR) has long been implicated as contributing to implantation failure. Despite the use of gonadotropin-releasing hormone (GnRH) analogues, subtle increases in serum progesterone () levels beyond a threshold progesterone concentration were observed on the day of trigger in controlled ovarian hyperstimulation cycles.

Aims: The purpose of the study was to evaluate the incidence of PPR on the day of trigger in conventional IVF/ICSI cycles and its impact on clinical pregnancy rate.

Luminescence and advanced mass spectroscopic characterization of sodium zinc orthophosphate phosphor for low-cost light-emitting diodes.

A new rare-earth-free NaZnPO4:Mn(2+) (NZP:Mn) phosphor powder has been developed by our group and investigated meticulously for the first time using secondary ion mass spectroscopy and chemical imaging techniques. The studies confirmed the effective incorporation of Mn(2+) into the host lattice, resulting in an enhancement of photoluminescence intensity. Phase purity has been verified and structure parameters have been determined successfully by Rietveld refinement studies.