Inorganic nanoparticles: An effective antibiofilm strategy.

Biofilm is a common problem associated with human health. Pathogenicity and increase in resistance of bacteria require urgent development of effective ways for the treatment of bacterial diseases. Different strategies have been developed for the treatment of bacterial infections among which nanoparticles have shown greater prospects in battling with infections.

Synthesis and study of optical properties of a Gd-doped NaYF phosphor for phototherapy lamp application.

In recent trends, radiation falls under the narrowband ultraviolet-B region (305-315 nm) widely used in phototherapy lamp applications in the treatment of skin diseases. In this paper, we report a Gd-doped NaYF luminescent material synthesized for the first time using the low-temperature co-precipitation method. It crystallized into a face-centred cubic structure, as confirmed by X-ray diffraction characterization techniques and Rietveld refinement.

Synthesis and study of luminescence properties of a deep red-emitting phosphor K LiAlF :Mn for plant cultivation.

Light is the most important component in plant growth and development. This study synthesised a novel Mn -doped K LiAlF red-emitting phosphor using the coprecipitation method. We observed that on addition of dopant Mn ions to the host K LiAlF , its phase changed from rhombohedral to cubic due to the change in the lattice position of the atoms.

Biosynthesis of Al O and europium-doped Al O nanoparticle using Cymbopogon citratus (lemongrass) extract and its antibacterial property.

Cymbopogon citratus-mediated pure aluminium oxide (Al O ) and europium (Eu)-doped Al O with different amounts of metal ion were prepared using a green synthesis method. Synthesised nanoparticles were characterised by ultraviolet (UV)-visible spectroscopy, photoluminescence (PL), Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Synthesis of nanoparticles is confirmed by using UV-visible spectroscopy showing maximum absorption at 411 and 345 nm for Al O and Eu-doped Al O , respectively.

Optical analysis of RE (RE = Eu,Tb):MgLa V O nano-phosphors.

Red and green rare-earth ion (RE ) (RE = Eu, Tb):MgLa V O micro-powder phosphors were produced utilizing a standard solid-state chemical process. The X-ray diffraction examination performed on the phosphors showed that they were crystalline and had a monoclinic structure. The particles grouped together, as shown in the scanning electron microscopy (SEM) images.

Investigations of thermoluminescence characteristics of SrAlBO :Eu phosphors irradiated with gamma rays and carbon ion beam.

A series of SrAlBO :Eu phosphors doped with different concentrations of Eu (0.1, 0.3, 0.

Green synthesis-assisted copper nanoparticles using Aegle marmelos leaves extract: physical, optical, and antimicrobial properties.

In the present report, Aegle marmelos leaf powder was used to synthesize copper nanoparticles (CuNPs) using a simple and cost-effective method. A. marmelos leaves have various medicinal uses including for the treatment of diarrhoea, constipation, diabetes, cholera, skin diseases, earache, blood purification, heart problems, and so on.

Structural, morphological, and photoluminescence properties of RE (RE = Dy , Eu , Sm )-doped CaAlBO phosphor synthesized by combustion method.

The CaAlBO :RE (RE = Dy , Eu , Sm ) phosphor were prepared via combustion synthesis and studied by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) analysis, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), photoluminescence (PL) spectra and CIE coordinates. The phase formation of the obtained phosphor was analyzed by XRD and the result was confirmed by standard PDF Card No. 1539083.

Assessment of dosimetric impact of interfractional 6D setup error in tongue cancer treated with IMRT and VMAT using daily kV-CBCT.

Background: This study aimed to evaluate the dosimetric influence of 6-dimensional (6D) interfractional setup error in tongue cancer treated with intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) using daily kilovoltage cone-beam computed tomography (kV-CBCT).

Materials And Methods: This retrospective study included 20 tongue cancer patients treated with IMRT (10), VMAT (10), and daily kV-CBCT image guidance. Interfraction 6D setup errors along the lateral, longitudinal, vertical, pitch, roll, and yaw axes were evaluated for 600 CBCTs.

Thermoluminescence studies of zinc borate (ZnB O ) phosphor doped with rare earths for dosimetric aspects.

A series of ZnB O phosphors doped with different concentrations of Eu and Dy (0.05 0.1, 0.

EVALUATION OF ACCURACY AND INTRINSIC UNCERTAINTY OF AUTOMATED IMAGE REGISTRATION FOR A 6D KV-CBCT IMAGE GUIDANCE SYSTEM: A CONCURRENT ANALYSIS WITH A MACHINE PERFORMANCE CHECK.

The accuracy and uncertainty of the automated image registration (AIR) algorithm in a six-dimensional (6D) kilovoltage cone-beam computed tomography (kV-CBCT) image-guided radiation therapy (IGRT) system were evaluated with a concurrent analysis of machine performance check (MPC). The MPC was performed before (MPCpre) and after (MPCpost) each accuracy and intrinsic uncertainty measurement. The accuracy was evaluated for 25 sets of the known shifts applied to the Catphan-504 phantom through a 6D robotic couch in the head, thorax, and pelvis CBCT acquisition modes.

Optical and thermal properties of rare earth-doped K Ca(PO ) phosphor.

The luminescent properties and energy transfer (ET) mechanism in the Ln pair of the RE (RE = Eu , Ce , Dy and Sm ) doped K Ca(PO ) phosphor were successfully investigated using a conventional high-temperature solid-state reaction. In the near infrared (NIR) range, Ce -doped K Ca(PO ) phosphor exhibited a UV-Vis. emission band, whereas K Ca(PO ) :Dy exhibited characteristic emission bands centred at 481 and 576 nm in the near-ultraviolet excitation range.

Intensity enhancement of photoluminescence in Tb /Eu co-doped Ca Zn Al O phosphor for WLEDs.

This article focuses on the effect of monovalent cation doping on the optical properties of rare earth (RE = Eu , Tb ) co-doped Ca Zn Al O which has been synthesized by a low temperature combustion method. Crystalline phase of the Ca Zn Al O phosphor was examined and confirmed by X-ray diffraction measurement. Under near-ultraviolet light excitation Eu -doped Ca Zn Al O phosphor exhibit characterization of Eu emission bands that are located at a maximum wavelength (λ ) of approximately 470 nm and other peaks centred at 593 nm and 615 nm, respectively.

Synthesis and novel emission properties of Bi -doped Ca BO Cl phosphor for plant cultivation.

In the present work, a series of Bi -activated Ca BO Cl phosphors was synthesized using the conventional high-temperature solid-state reaction method. The crystal structure of the prepared sample was determined to be monoclinic with space group P21/c. Scanning electron microscopy (SEM) analysis demonstrated the surface morphology with aggregated particles and sizes in the nano range.

Luminescence investigation of Sm ,Eu -activated/co-activated Ba AlB O Cl phosphors: novel red to blue colour tuning in chloroborates.

Borochlorate phosphors have shown their worth in modern day lighting over the last few years. Colour tunability of the phosphor is a modern techniques used to obtain white-light-emitting diodes (WLEDs). In the proposed work, Sm ,Eu -activated/co-activated Ba AlB O Cl phosphors were investigated for WLED applications as well as display devices.

Combustion-assisted Ca Na Al O :Sm phosphors for solid-state lighting and WLED applications.

Aluminate-based phosphors have been the most investigated luminescent phosphors over decades due to their outstanding optical properties. In the proposed work, a series of Sm -doped Ca Na Al O (CNAO) phosphor sample was prepared using a simple combustion technique with the help of two fuels i.e.

QUANTIFICATION OF 6D INTER-FRACTION TUMOUR LOCALISATION ERRORS IN TONGUE AND PROSTATE CANCER USING DAILY KV-CBCT FOR 1000 IMRT AND VMAT TREATMENT FRACTIONS.

This study aimed to evaluate the 6D inter-fraction tumour localisation errors in 20 tongue and 20 prostate cancer patients treated with intensity-modulated radiation therapy and volumetric-modulated arc therapy. The patient tumour localisation errors in lateral, longitudinal and vertical translation axes and pitch, roll and yaw rotational axes were analysed by automatic image registration of daily pretreatment kilovoltage cone-beam computed tomography (kV-CBCT) with planning CT in 1000 fractions. The overall mean error (M), systematic error (Σ), random error (σ) and planning target volume (PTV) margins were evaluated.

Luminescence properties of MgCaAl O :RE (RE = Sm ,Dy ) phosphor for eco-friendly solid-state lighting applications.

Different concentrations of rare earth Sm - and Dy -activated MgCaAl O phosphors were synthesized using the combustion route and their detailed luminescence investigations are reported in this paper. The photoluminescence excitation spectra of Sm - and Dy -activated MgCaAl O phosphor show multiple peaks in the ultraviolet light region of the electromagnetic spectrum. The characteristic emission spectra of the MgCaAl O :Sm phosphor are located at 563 nm, 594 nm, and 644 nm, with the maximum emission intensity occurring at 594 nm.

Wet chemical synthesis of BiPO :Eu phosphor for w-LED application.

The synthesis of BiPO :Eu phosphors has been achieved via a wet chemical process. X-ray diffraction patterns show that the phase of the as-prepared samples matches very well with the standard BiPO structure. At 395 nm, the highest excitation intensity was observed.

Photoluminescence and thermoluminescence in Dy -, Ce -, and Tb -activated MgB O phosphor for dosimetry application.

Samples of microcrystalline rare earth-doped magnesium borate materials were synthesized via modified solid-state diffusion and were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Photoluminescence (PL) results for the MgB O :Dy sample depicts blue emission that resulted from a F - H transition that peaked at 484 nm, which was much stronger than the yellow emission arising due to the F - H transition at 576 nm. From the emission spectra for MgB O :Tb, it seems that at higher concentrations of Tb ion, the green emission becomes strong and directly relates to the energy transfer from the D excited state to the D excited state through a cross-relaxation, whereas the blue emission is suppressed in MgB O phosphors.

Luminescence study of Sm ,Eu -doped Y Zr O host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor.

Pyrochlore phosphors have shown their worth in modern day lighting in the last few years. Colour tunability of the phosphor is one of the modern techniques used to obtain white light-emitting diodes (WLEDs). In the proposed work, Y Zr O :Sm ,Eu phosphors were investigated for WLED applications as well as display devices.

Evaluation of kV-CBCT based 3D dose calculation accuracy and its validation using delivery fluence derived dose metrics in Head and Neck Cancer.

Purpose: The purpose of this study is to evaluate the dosimetric impact of Hounsfield unit (HU) variations in kilovoltage cone-beam computed tomography (kV-CBCT) based 3D dose calculation accuracy in the treatment planning system and its validation using measured treatment delivery dose (MTDD) derived dose metrics for Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiotherapy (IMRT) plans in Head and Neck (HN) Cancer.

Methods: CBCT dose calculation accuracy was evaluated for 8 VMAT plans on inhomogeneous phantom and 40 VMAT and IMRT plans of HN Cancer patients and validated using ArcCHECK diode array MTDD derived 3D dose metric on CT and CBCT.

Results: The mean percentage dose difference between CBCT and CT in TPS (ΔD(CBCT-CT)) and 3DVH (ΔD(CBCT-CT)) were compared for the corresponding evaluation dose metrics (D, D, D, D, D, D, D, D) of all PTVs and OARs in phantom and patients.

Study on luminescence properties of Ce and Eu ions in a nanocrystalline hexagonal Zn Al O novel system.

The present communication is strongly focused on the investigation of synthesis, structural and luminescence properties of cerium (Ce )- and europium (Eu )-activated Zn Al O phosphors. Ce - and Eu -doped Zn Al O novel phosphors were prepared using a solution combustion synthesis route. Structural properties were studied using powder X-ray diffraction and high-resolution transverse electron microscopy.

Novel red colour emitting Ca Mg (SO ) :0.5Eu phosphor under ultraviolet, blue, and green excitation for plant growth LEDs.

In the recent few years, Eu - and Mn -activated phosphors are widely used as potential colour converters for indoor plant cultivation lighting application due to their marvellous luminescence characteristics as well as low cost. In this investigation, we synthesized novel red colour-emitting Ca Mg (SO ) :xmol% Eu (x = 0-1.0 mol%) phosphors via a solid-state reaction method in a reducing atmosphere.

Structural and photoluminescence properties of Dy -activated NaCaPO phosphor derived from solution combustion.

In the current investigation, a series of NaCa PO :xDy (x = 0.1, 0.3, 0.