Far-Infrared Emission Properties and Thermogravimetric Analysis of Ceramic-Embedded Polyurethane Films

The far-infrared ray (FIR) is one kind of electromagnetic wave employed for numerous bio-interactive applications such as body thermoregulation, infrared therapy, etc. Tuning the FIR-emitting property of the functional textile surface can initiate a new horizon to utilize this property in sportswear or even smart textiles. Ceramic particles were studied for their unique ability to constantly emit FIR rays. The purpose of this research is to characterize the FIR emission properties and the thermogravimetric analysis of ceramic-embedded polyurethane films. For this purpose, ceramic particles such as aluminum oxide, silicon dioxide, and titanium dioxide were incorporated (individually) with water-based polyurethane (WPU) binder by a sonication technique to make a thin layer of film. Significant improvement in FIR emissive property of the films was found when using different ceramic particles into the polyurethane films. Reflection and transmission at the FIR range were measured with a gold integrating sphere by Fourier-transform infrared (FTIR) spectrometer. The samples were also characterized by thermogravimetric analysis (TGA). Different physical tests, such as tensile strength and contact angle measurements, were performed to illustrate the mechanical properties of the films. The study suggested that the mechanical properties of the polyurethane films were significantly influenced by the addition of ceramic particles.

A unique dual fluorescence emission in solid-state from small molecule based on phenanthrocarbazole with AIE luminogen as single-molecule white-light emissive material

Purely organic molecules with dual emissive property have received increased attention in the last decade as they are now being utilized in practical optoelectronic, sensing and biomedical applications. We presented...

Turning on Light Emission of a Dark Pro-AIEgen in Aqueous Media through Reductase-Modulated Derotation

The development of dark pro-AIEgens based on solid-state intramolecular motion-caused quenching effect has been rarely reported in biochemical analysis. Herein, an azo-conjugated pro-AIEgen derived from tetraphenylethene is constructed. Owing to the active photoisomerization of the azo bond, it retains a non-emissive property in both solution and solid forms. <a>The obtained pro-AIEgen can be internalized by living cells and undergo reductase-modulated derotation under hypoxia to </a>emit the light. It shows <a>increas</a>ing fluorescence when intracellular oxygen concentration becomes lower, making it a potential probe to sense the hypoxic environment. The present probe can also visualize the hypoxic environment created by photodynamic therapy treatment.

Turning on Light Emission of a Dark Pro-AIEgen in Aqueous Media through Reductase-Modulated Derotation

The development of dark pro-AIEgens based on solid-state intramolecular motion-caused quenching effect has been rarely reported in biochemical analysis. Herein, an azo-conjugated pro-AIEgen derived from tetraphenylethene is constructed. Owing to the active photoisomerization of the azo bond, it retains a non-emissive property in both solution and solid forms. <a>The obtained pro-AIEgen can be internalized by living cells and undergo reductase-modulated derotation under hypoxia to </a>emit the light. It shows <a>increas</a>ing fluorescence when intracellular oxygen concentration becomes lower, making it a potential probe to sense the hypoxic environment. The present probe can also visualize the hypoxic environment created by photodynamic therapy treatment.

Ultraviolet Carbon Nanodots Providing a Dual-Mode Spectral Matching Platform for Synergistic Enhancement of the Fluorescent Sensing

The sensing of chromium(VI) (Cr(VI)) is highly desired, due to its toxic and carcinogenic effects upon human health. Fluorescent probes, especially carbon nanodots (CNDs), have been widely used for Cr(VI) sensing via the inner filter effect (IFE). However, improving the sensitivity of these probes remains a difficult issue. In this work, CNDs derived from β-Lactoglobulin were applied as an ultrasensitive fluorescent probe for Cr(VI). With 260 nm excitation, the CNDs showed multi-band emission, including an ultraviolet 360 nm peak. The spectral matching of the CNDs with Cr(VI) led to synergistic suppression of both the excitation and emission light in the fluorescent sensing. As a consequence, the CNDs showed high sensitivity toward Cr(VI), the detection limit reaching as low as 20 nM. Moreover, taking advantage of the multi-emissive property of the CNDs, the synergistic effect was proven in an IFE-based sensing system, which might be extended to the design of other kinds of fluorescent probes.

APPLICATION OF THERMOGRAPHY TO ANALYZE THE EFFECTIVENESS OF ERGOMETER TRAINING

The work determines the degree of thermographic suitability of the method of temperature measurement in people exercising on a rowing ergometer. Thermography is gaining popularity in medical diagnostics by measuring the body temperature. Its main advantages are non-invasive, safe and comfortable for patients. It is widely used in the prevention of breast cancer and treatment of osteoarticular injuries. The basis for the use of thermography in medicine is the phenomenon of thermoregulation of living organisms and the emissive property of the skin, which is similar in value to a perfectly black body.To achieve the set goal, 10 people were trained on the rowing ergometer. During the two series of measurements (before and immediately after), the focus was on two areas of the subjects' body: upper limbs and abdomen.The thermographs obtained were analyzed taking into account the physical and physiological parameters of the players and their experience. The conclusions from them seemed to answer the thesis that the thermographic method is suitable for supporting players in planning and improving their training. It has also been shown that training on a rowing ergometer involves many muscle parties in which an increase in the released metabolic heat takes place.

Intriguing cysteine induced improvement of the emissive property of carbon dots with sensing applications

Cysteine rescues the quenched fluorescence of alkaline DA to a significant extent, and thus provides a way for cysteine sensing. Further improvement in detection limit occursviaMHT treatment.

A highly efficient warm white light-emitting Eu2+-activated silicate host: another striking application of mesoporous silica

The inception of a new silicate source namely mesoporous silica for the synthesis of Sr0.975Ca0.975Eu0.05SiO4 phosphor shows an excellent emissive property along with the suffice red spectral components.