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A molten salt (MS) method is designed for the preparation of carbon dot-based room temperature phosphorescent (RTP) materials. Carbon dots (CDs) are in situ formed and confined in inorganic salts during the recrystallization process. The composite materials CDs@MS and their RTP were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and low temperature (77 K) fluorescence and phosphorescence spectroscopy. The as-prepared CDs@MS exhibits long lifetime RTP (up to 886 ms) and excitation dependent phosphorescence, i.e., the emission can be facilely tuned from 510 nm to 573 nm (green to yellow color) by changing the excitation wavelength. The RTP phenomenon is ascribed to the fact that the crystallization of molten salts forms a rigid structure, which preserves the triplet state of CDs and suppresses the nonradiative transition. It was found that the high charge density of metal ions plays a critical role in reducing the energy gap for realizing effective intersystem crossing. CD-based RTP materials with yellow phosphorescent emission are achieved from a variety of carbon sources and a gram-scale synthetic method. The excitation dependent RTP feature of CDs@MS nanocomposites could provide a novel dual security protection strategy in high-level information anticounterfeiting.
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We report a series of room temperature phosphorescent compounds 1-6 composed of triarylborane (TAB) and cyclometallated iridium complexes. The optical characteristics such as energy of transition and ...
Carbon dots (CDs) with tunable emission colors and multiple emission modes are highly desirable in advanced optical anti-counterfeiting. Some pioneering efforts to trigger additional long-lived emissi...
Inorganic membranes based on carbon molecular sieve (CMS) films hosting slit-like pores can yield a high molecular selectivity with a sub-angstrom resolution in molecular differentiation, and therefor...
The structure, site occupancies, and photoluminescence (PL) properties of Ce- or Eu-doped CaLa(PO) phosphors were investigated in this work. The powder X-ray diffraction (XRD) data and Rietveld refine...
This communication reports the room temperature synthesis of stable CsPbBr3 nanocrystals inside a wormhole mesoporous alumina thin film, showing tunable blue and green emission. The choice of suitable...
Colorectal cancer is the second most common cancer in the world and the second leading cause of cancer-related mortality. Colorectal cancers arise from precursor adenomatous polyps in a w...
[Development of diagnosis algorism for paroxysmal arrhythmia using ultra-thin resistive membrane: a pilot study] Comparison of blood pressure via tunable crack sensor and invasive pressure...
The aim of the study was to investigate whether a color changing nail polish would be an indicator to assess infraclavicular brachial plexus block success based on skin temperature differe...
The purpose of this study is to compare first urge, strong urge, and maximum capacity, and perception of discomfort during urodynamic testing between room temperature and body temperate sa...
The purpose of this single-blind, randomized control trial will be to investigate whether simply having warmed gel, as compared to room-temperature gel, during a bedside ultrasound signifi...
A CHROMATOGRAPHY method using supercritical fluid, usually carbon dioxide under very high pressure (around 73 atmospheres or 1070 psi at room temperature) as the mobile phase. Other solvents are sometimes added as modifiers. This is used both for analytical (SFC) and extraction (SFE) purposes.
Medicated dosage forms that are designed to be inserted into the rectal, vaginal, or urethral orifice of the body for absorption. Generally, the active ingredients are packaged in dosage forms containing fatty bases such as cocoa butter, hydrogenated oil, or glycerogelatin that are solid at room temperature but melt or dissolve at body temperature.
Preparation for electron microscopy of minute replicas of exposed surfaces of the cell which have been ruptured in the frozen state. The specimen is frozen, then cleaved under high vacuum at the same temperature. The exposed surface is shadowed with carbon and platinum and coated with carbon to obtain a carbon replica.
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
A polyhedral CARBON structure composed of around 60-80 carbon atoms in pentagon and hexagon configuration. They are named after Buckminster Fuller because of structural resemblance to geodesic domes. Fullerenes can be made in high temperature such as arc discharge in an inert atmosphere.
Multiple Sclerosis MS
Multiple sclerosis (MS) is the most common disabling neurological condition affecting 100,000 young adults in the UK. The condition results from autoimmune damage to myelin, causing interference in nerve signaling. Symptoms experienced depend on the pa...
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...