The Influence of Plasmonic Au Nanoparticle Integration on the Optical Bandgap of Anatase TiO2 Nanoparticles

BaAl1.4Si0.6O3.4N0.6:Eu 2+ exhibiting broad excitation and emission bands with intense green emission centred at 510 nm is applied to produce high-performance white-light-emitting diodes (WLEDs). The preparation of the green phosphor utilizes NaNO3 molten salt to attain the purity phase and enhanced luminescence strength boosting the crystalline growth. The influences of BaAl1.4Si0.6O3.4N0.6:Eu 2+ on the lighting intensity and color adequacy are investigated at three correlated color temperatures (CCTs) of 3000 K, 4000 K and 5000 K. The lighting output of the WLEDs with high CCTs (4000 -5000 K) is deemed as enhanced with increasing green-phosphor concentration. The lower CCT shows greater lumen output when using a lower concentration of BaAl1.4Si0.6O3.4N0.6:Eu 2+ . This tendency also takes place in the case of color uniformity. Conversely, the high concentration of the phosphor is not favourable to the color rendition property of the WLED because of the excessive green-light proportion. It is recommended to keep the concentration of BaAl1.4Si0.6O3.4N0.6:Eu 2+ staying below 10 wt% for better color fidelity.

Section: Resultsmentioning

confidence: 94%

Utilization of BaAl1.4Si0.6O3.4N0.6:Eu2+ Green-emitting Phosphor to Improve Luminous Intensity and Color Adequacy of White Light-emitting Diodes

Thai¹,

Bui²,

Le³

et al. 2023

“…One common example is Zinc oxide (ZnO) nanoparticles with good antibacterial and biocompatibility properties (Christy Basha, and Kumari, 2022). Others, such as titanium dioxide (TiO2), are also high-conductivity materials with chemical stability and low toxicity (Khalil et al, 2019). As stated in a previous study, TiO2 is capable of facilitating osteoblast cell adhesion while enhancing the antibacterial ability of the scaffold (Cao et al, 2018).…”

Section: Introductionmentioning

confidence: 98%

Physical and Chemical Characterization of Collagen/Alginate/Poly(Vinyl Alcohol) Scaffold with the Addition of Multi-Walled Carbon Nanotube, Reduced Graphene Oxide, Titanium Dioxide, and Zinc Oxide Materials

Fajarani,

Rahman,

Pangesty

et al. 2024

Bone damage is one of the main causes of disability in humans, and tissue engineering technology by applying biomaterial-based scaffold has been developed as an effective solution. This can be achieved using various natural and synthetic polymers combined with carbon-based and metal-oxide materials. Therefore, this study aimed to develop bone scaffold using collagen, alginate, and poly(vinyl alcohol), with the addition of multi-walled carbon nanotube, reduced graphene oxide, titanium dioxide, and zinc oxide materials. Scaffold was fabricated with the freeze-drying method and characterized physicochemically by observing the morphology through scanning electron microscopy (SEM), identification of functional groups by Fourier transform infrared spectroscopy (FTIR), compressive mechanical properties, porosity, and degradation rate. The results showed that each group of scaffold had a compact structure, with a small pore size and less than 50% porosity. The functional groups of each material were detected, and the compressive strength matched the trabecular bone, approximately 6 MPa. However, the scaffold lacked appropriate porosity and a fast degradation rate exceeding 35% in 7 days.

“…Research into nanotechnology has garnered significant interest worldwide over the last few decades due to its superior physical, chemical, and biological properties compared to its bulk form (Usman et al, 2018;Khalil et al, 2019). One of the most promising nanoparticles in the scientific world is silver nanoparticles (AgNPs).…”

Section: Introductionmentioning

confidence: 99%

Biogenic Silver Nanoparticles (AgNPs) from Marphysa moribidii Extract: Optimization of Synthesis Parameters

Rosman¹,

Masimen²,

Harun³

et al. 2021

Interest in biogenic silver nanoparticles (AgNPs) is steadily increasing due to the costeffective, easy, and environmentally friendly way in which they are synthesized. Synthesis using polychaete (Marphysa moribidii) extract as a reducing agent is particularly new and has the potential of being applied in various industries. However, biogenic AgNPs require synthesis optimization to increase their stability, yield, and characteristics. To meet these requirements, several synthesis parameters (such as polychaete size (body width), silver nitrate (AgNO3) concentration, pH of polychaete crude extract, and the temperature during pre-incubation) and storage conditions were optimized in this study. The optimized conditions for obtaining high yield and stable AgNPs were polychaetes with a body width of 6-8 mm, 1 mM AgNO3 with polychaete crude extract of pH 9, preheated at 90°C for 15 min before incubation at 30°C (150 rpm) for 24 hours, and stored at 4°C for long-term stability. The formation of AgNPs was confirmed through observation of a color transition (from pinkish to yellowish-brown) and analysis of UV-Vis spectra (between 398 and 400 nm). Scanning electron microscopy and transmission electron microscopy revealed the formation of spherical AgNPs with an average size of approximately 40.19 nm. Further, the optimized AgNPs demonstrated high storage stability for up to 6 months without any agglomeration. It is believed that these parameters are eminently suitable for the production of stable biosynthesized AgNPs.