Tailoring Spectroscopic Properties of Er3+ doped Zinc Sodium Tellurite Glass via Gold Nanoparticles

Tailoring the spectroscopic properties of rare earth (RE) doped inorganic glasses mediated via surface plasmon resonance (SPR) by embedding metallic nanoparticles (NPs) with controlled concentration is prerequisite for photonic applications. Erbium (Er3+) doped tellurite glasses containing gold (Au) NPs are prepared and systematic characterizations are made to inspect the impacts of Au NPs of spectral features for desired tailoring. X-ray diffraction pattern confirm the amorphous nature of the glass samples and EDX analysis detects elemental traces. The UV-Vis spectra exhibit six absorption bands centered at 488, 523, 655, 800, 973 and 1533 nm corresponding to 4f-4f transitions of Er3+ ions. Glass sample containing 0.4 mol% Au (without Er2O3) reveals Au plasmon band at around 629 nm. The EDX spectra display elemental traces of Te, Er, Zn, Na and Au. Glass sample containing 0.2 mol% Au demonstrates maximum enhancement in the emission band intensity by a factor of 20.23 (orange), 18.35 (strong green), 16.80 (moderate green) and 15.46 (blue). The enhancement is attributed to the Au NPs assisted SPR effect. The beneficial features of proposed glasses nominate them as potential candidate for photonic devices and solid state lasers

Growth of Titania Nanoparticles Assists Self-Cleaning Features of Glass

Self-cleaning glasses became demanding for various advanced applications due to their manifold advantages. In this view, tellurite glasses containing titania nanoparticles (TiO2 NPs) with varying concentration were synthesized using standard melt-quenching. The TEM images of the glasses showed the presence of elongated TiO2 NPs with lattice spacing of 3.78 Å. TiO2 NPs are found to grow further in the longitudinal and transverse axes ranging from 7−23 nm and 5−10 nm for TZETi glass and from 8−27 nm and 6−14 nm for TZETi-HT345 glass. The observed reduction in the water contact angle from 67.5° to 34.7° of the glasses indicated their hydrophilic nature. Growth of TiO2 NPs induced by the heat treatment process reduces the water contact angle due to water droplets that tends to form a film and reduces water contact angle which in turn facilitates the removal of dirt on the glass surface. It was demonstrated that by adjusting the shape and size of TiO2 NPs tailored the hydrophilic traits of the glasses

Effect of heat treatment on the spectroscopic properties of tellurite glass

This study reports the spectroscopic properties of tellurite glass with composition of 70TeO220ZnO9.5Na2O0.5Er2O3 synthesized using melt-quenching technique. The spectroscopic properties of glasses with heat treatment at varying temperature are found to vary due to the structural changes. The DTA spectra of TZNE glass evidenced the glass transition temperature (Tg), onset crystallization temperature (Tx) and glass crystallization temperature (TC1 and TC2) located at 79 °C, 307 °C, 435 °C and 696 °C, respectively. The FTIR spectra were recorded at room temperature shows the significant peaks positioned at 493 cm-1 , 559 cm-1 , 678 cm-1 , 2184 cm-1 , 2332 cm-1 and 3795 c

Silver nanoparticles assisted spectral features enhancement of Samarium-Zinc-Tellurite glass

Achieving the enhanced optical properties of rare earth doped inorganic glasses by embedding metallic nanoparticles (NPs) is ever-demanding in photonics. Optimized doping of NPs and subsequent thorough characterizations for improved absorption and emission are the key issues for lasing glasses. We inspect the influence of silver (Ag) NPs inclusion on the optical properties of Sm3+ doped zinc-sodium tellurite glasses having composition 65TeO2-25ZnO-10Na2O- (0.15 gram)Sm2O3-(y)AgCl, where y = 0, 0.03, 0.075, 0.12 and 0.18 gram (in excess). Glass samples are prepared using melt quenching technique and characterized via ultraviolet visible near infrared (UV-Vis-NIR) absorption and photoluminescence (PL) spectroscopy. The presence of NPs is verified from TEM images and the amorphous nature is confirmed from XRD pattern. The UV-Vis- NIR spectra revealing six absorption peaks centered at 472, 943, 1089, 1237, 1392, and 1491 nm are assigned to 6H5/2→4I11/2, 6F11/2, 6F9/2, 6F7/2, 6F5/2, 6F3/2 transitions, respectively. PL spectra exhibit two emission bands located at 599 nm (4G5/2→6H7/2) and 643 nm (6H9/2). The observed enhancement in PL intensity is attributed to the highly localized electric field of Ag NPs positioned in the vicinity of Sm3+ ion. The mechanism of enhancement is identified, analyzed, and understood. The admirable features of our results are highly beneficial for solidstate laser and optical device fabrication

Tailoring spectroscopic properties of Er3+doped zinc sodium tellurite glass via gold nanoparticles

Tailoring the spectroscopic properties of rare earth (RE) doped inorganic glasses mediated via surface plasmon resonance (SPR) by embedding metallic nanoparticles (NPs) with controlled concentration is prerequisite for photonic applications. Erbium (Er3+) doped tellurite glasses containing gold (Au) NPs are prepared and systematic characterizations are made to inspect the impacts of Au NPs of spectral features for desired tailoring. X-ray diffraction pattern confirm the amorphous nature of the glass samples and EDX analysis detects elemental traces. The UV-Vis spectra exhibit six absorption bands centered at 488, 523, 655, 800, 973 and 1533 nm corresponding to 4f-4f transitions of Er3+ ions. Glass sample containing 0.4 mol% Au (without Er2O3) reveals Au plasmon band at around 629 nm. The EDX spectra display elemental traces of Te, Er, Zn, Na and Au. Glass sample containing 0.2 mol% Au demonstrates maximum enhancement in the emission band intensity by a factor of 20.23 (orange), 18.35 (strong green), 16.80 (moderate green) and 15.46 (blue). The enhancement is attributed to the Au NPs assisted SPR effect. The beneficial features of proposed glasses nominate them as potential candidate for photonic devices and solid state laser

Tailoring spectroscopic properties of Er3+doped zinc sodium tellurite glass via gold nanoparticles

Tailoring the spectroscopic properties of rare earth (RE) doped inorganic glasses mediated via surface plasmon resonance (SPR) by embedding metallic nanoparticles (NPs) with controlled concentration is prerequisite for photonic applications. Erbium (Er3+) doped tellurite glasses containing gold (Au) NPs are prepared and systematic characterizations are made to inspect the impacts of Au NPs of spectral features for desired tailoring. X-ray diffraction pattern confirm the amorphous nature of the glass samples and EDX analysis detects elemental traces. The UV-Vis spectra exhibit six absorption bands centered at 488, 523, 655, 800, 973 and 1533 nm corresponding to 4f-4f transitions of Er3+ ions. Glass sample containing 0.4 mol% Au (without Er2O3) reveals Au plasmon band at around 629 nm. The EDX spectra display elemental traces of Te, Er, Zn, Na and Au. Glass sample containing 0.2 mol% Au demonstrates maximum enhancement in the emission band intensity by a factor of 20.23 (orange), 18.35 (strong green), 16.80 (moderate green) and 15.46 (blue). The enhancement is attributed to the Au NPs assisted SPR effect. The beneficial features of proposed glasses nominate them as potential candidate for photonic devices and solid state laser

Effect of heat treatment on the physical and structural properties of tellurite glass

This study reports the spectroscopic properties of tellurite glass with a composition of 70TeO2-20ZnO-9.5Na2O-0.5Er2O3 synthesized using the melt-quenching technique. The physical and structural properties of glass heat treated at distinctive temperatures are found to vary due to the structural changes. The incorporation of erbium content into tellurite glass causes the glass to appear reddish in color and transparent. However, glass heat-treated at 400°C shows the tendency to become opaque due heat treatment near the crystallization temperature. XRD pattern indicated the amorphous nature of glass with the presence of a broad hump in the range 25° to 40°

Modification in Structural and Optical Properties of Erbium-doped Zinc Sodium Tellurite Glass: Effect of Bimetallic Nanoparticles

The demand in accomplishing modified structural and optical features of trivalent rare earth (RE) ions doped amorphous media through the incorporation of metallic nanoparticles (NPs) of controlled sizes is ever-increasing for short wavelength solid state lasers development. In this view, we attempt to alter the optical properties of bimetallic NPs and erbium (Er3+) integrated zinc-sodium-tellurite glass. Modifications in structural properties are triggered via precise control of titanium and copper NPs nucleation and growth processes underneath the amorphous matrix. The changes in ligand interactions in the fragile disordered matrix are found to be accountable for the variations in structural and optical properties. A series of glass with composition of (70-x-y)TeO2-20ZnO-9Na2O-1Er2O3-(x)CuO-(y)TiO2 (x = 0.0 and 0.04 mol%; y = 0.0 and 0.1 mol%) are prepared following melt-quenching method and characterized. UV-Vis-NIR spectra displayed seven absorption bands corresponding to the transitions from ground state (4I15/2) to 4F5/2, 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2 and 4I11/2 excited states of Er3+. FTIR spectra show the presence of symmetric Te-O-Te linkage vibrations and stretching vibrations of Cu-O on monoclinic CuO, Te-O bond of the trigonal bypiramidal unit [TeO4] with non-bridging oxygen symmetrical TeO3 groups and vibrations of water molecule. The presence of bimetallic NPs is confirmed from transmission electron microscopy (TEM) imaging. Our glass composition demonstrating such significant modification in structural and optical properties may be beneficial for the development of plasmonic devices

Effect of Annealing Temperature of Cugao2 thin Films by Using RF Magnetron Sputtering Technique on Optical and Structural Properties

Cu-based conductive oxide such as CuGaO2 is seen to be a promising transparent p-type oxide material. The study of p-type semiconductor CuGaO2 thin films have been carried out to investigate the effects of different parameters in providing the optimum result in achieving good optical transparency and conductivity of the thin film. The CuGaO2 thin films were fabricated on quartz substrate via the Radio Frequency (RF) magnetron sputtering technique with varying substrate temperatures and different annealing temperatures. The p-type thin films were deposited at a temperature ranging from room temperature, 100°C, 200°C and 300°C. The samples were also annealed varying from temperature of 500°C, 600°C, 700°C and 800°C. The fabricated sample were characterized using X-ray diffraction (XRD), UV-Visible spectroscopy, and atomic force microscope (afm). XRD showed a peak at 2θ = 36.10° (012). The optical transparency values achieved from UV-Vis spectrometer were seen to be approximately 80% and the bandgaps were found to be in the range of 3.34-3.43 eV which is in line with the bandgap value from the research on CuGaO2 thin films. From the afm, the mean surface roughness increases with increasing temperature and this is due to the increment of grain size. The highest grain size was observed at substrate temperature of 200°C

Bioelectricity generation from bamboo leaves waste in a double chambered microbial fuel cell

This study investigated the utilization of bamboo leaf waste and two varieties of bacterial sources, chicken manure and effective microorganism, in a microbial fuel cell (MFC) at three substrate concentrations (40 g/liter, 80 g/liter, and 160 g/liter). The primary objective was to investigate the kinetics of bacterial growth at various substrate concentrations in the MFC, as well as the effect of light conditions and pH on MFC power generation. The MFC had dual chambers with graphite electrodes serving as the cathode and anode. Within 72 h, the highest power density of 90.05 mV was attained using the highest substrate concentration of bamboo leaf waste and chicken manure during the logarithmic growth phase, albeit with a shorter duration. The longest sustained phase of bacterial activity was observed during the stationary phase, at the highest substrate concentration of 160 g/liter, followed by 80 g/liter and 40 g/liter. These results indicate that the logarithmic phase is the optimal time for bacterial activity in the MFC. However, attaining long-term stability in power generation in the logarithmic phase requires careful parameter optimization