scholarly journals Folic Acid-Conjugated Silica-Modified TbPO4·H2O Nanorods for Biomedical Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Le Thi Vinh ◽  
Tran Thu Huong ◽  
Ha Thi Phuong ◽  
Hoang Thi Khuyen ◽  
Nguyen Manh Hung ◽  
...  
Keyword(s):  
Folic Acid ◽  
Biomedical Applications ◽  
Breast Cancer Cells ◽  
Hexagonal Phase ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Wet Chemical ◽  
The Fourier Transform

We report on the synthesis and characterization of folic acid-conjugated silica-modified TbPO4·H2O nanorods for biomedical applications. The uniform shape TbPO4·H2O nanorods with a hexagonal phase were successfully synthesized by wet chemical methods. A novel TbPO4·H2O@silica-NH2 nanocomplex was then formed by functionalizing these nanorods with silica and conjugating with biological agents. The field emission scanning electron microscopy, energy-dispersive X-ray, and X-ray diffraction reveal the morphology and structure of the nanorods, with their controllable sizes (500-800 nm in length and 50-80 nm in diameter). The Fourier transform infrared spectroscopy was employed to identify chemical substances or functional groups of the TbPO4·H2O@silica-NH2 nanocomplex. The photoluminescence spectra show the four emission lines of TbPO4·H2O@silica-NH2 in folic acid at 488, 540, 585, and 621 nm under 355 nm laser excitation, which could be attributed to the 5D4-7 F j ( J = 6 , 5 , 4 , 3 ) transitions of Tb3+. The TbPO4·H2O@silica-NH2 nanorods were conjugated with folic acid for the detection of MCF7 breast cancer cells. The obtained results show a promising possibility for the recognition of living cells that is of crucial importance in biolabeling.

Sonochemical Synthesis and Characterization of Hydroxyapatite Nanoparticles

2011 ◽  
Vol 312-315 ◽  
pp. 423-426 ◽  
Author(s):  
M. Mohebali ◽  
Ali Shokuhfar
Keyword(s):  
Ultrasound Irradiation ◽  
Hydroxyapatite Nanoparticles ◽  
X Ray Diffraction ◽  
Sonochemical Synthesis ◽  
Chemical Methods ◽  
Decrease Particle Size ◽  
X Ray ◽  
Wet Chemical ◽  
Microscopy Techniques

Hydroxyapatite (HA) is a bioactive ceramic, employed mainly in bone tissue engineering since it exhibits superior biocompatibility and osteoconductivity. Attempts have been made to synthesize HA nanoparticles with chemical composition, morphology, crystallinity and Ca/P ratio similar to that of natural bone. While wet chemical methods are becoming more popular for synthesis of HA nanoparticles, ultrasound irradiation has shown to be an effective method to increase the rate of production and also to decrease particle size. However, process variables must be carefully selected. In the present study, HA nanoparticles with desirable characteristics have been synthesized by the aid of ultrasound irradiation and characterized by powder X-ray diffraction (XRD) and electron microscopy techniques.

scholarly journals Characterization of ferrite nanoparticles for preparation of biocomposites

2017 ◽  
Vol 8 ◽  
pp. 1257-1265 ◽  
Author(s):  
Urszula Klekotka ◽  
Magdalena Rogowska ◽  
Dariusz Satuła ◽  
Beata Kalska-Szostko
Keyword(s):  
Chemical Method ◽  
Ferrite Nanoparticles ◽  
Chemical Activity ◽  
Nominal Composition ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Transmission Electron ◽  
Wet Chemical

Ferrite nanoparticles with nominal composition Me0.5Fe2.5O4 (Me = Co, Fe, Ni or Mn) have been successfully prepared by the wet chemical method. The obtained particles have a mean diameter of 11–16 ± 2 nm and were modified to improve their magnetic properties and chemical activity. The surface of the pristine nanoparticles was functionalized afterwards with –COOH and –NH2 groups to obtain a bioactive layer. To achieve our goal, two different modification approaches were realized. In the first one, glutaraldehyde was attached to the nanoparticles as a linker. In the second one, direct bonding of such nanoparticles with a bioparticle was studied. In subsequent steps, the nanoparticles were immobilized with enzymes such as albumin, glucose oxidase, lipase and trypsin as a test bioparticles. The characterization of the nanoparticles was acheived by transmission electron microscopy, X-ray diffraction, energy dispersive X-ray and Mössbauer spectroscopy. The effect of the obtained biocomposites was monitored by Fourier transform infrared spectroscopy. The obtained results show that in some cases the use of glutaraldehyde was crucial (albumin).

Shape-Controlled Synthesis and Characterization of CuS Crystal from a Low Temperature Hydrothermal Route

2008 ◽  
Vol 47-50 ◽  
pp. 903-906
Author(s):  
Li Fei Chen ◽  
Hua Qing Xie ◽  
Yang Li ◽  
Wei Yu
Keyword(s):  
Hexagonal Phase ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
X Ray ◽  
Near Ir ◽  
Electron Microscope Analysis ◽  
Shape Controlled ◽  
Tubular Morphology

Copper sulfide (CuS) nanocrystals with flower-like and tubular morphology have been successfully synthesized via a facile and convenient hydrothermal route at 75 °C by using CuCl2·2H2O as Cu-precursor, C2H5NS as S-source and CTAB as template molecules. The effect of concentration of reactants and template molecules on morphology has been discussed. X-ray diffraction pattern suggests that the CuS crystals are pure hexagonal phase. The morphology of the products has been studied by scanning electron microscope analysis. The absorption peaks of CuS in UV and near-IR regions indicate that the as-prepared CuS are promising in the development of photoelectric devices.

Microstructure and Properties of Nanosemicrystalline Si3N4 Ceramics with Doped Sintering Additives: Part I. Microstructural Characterization of Nanosemicrystalline Si3N4 Powders

1998 ◽  
Vol 13 (9) ◽  
pp. 2580-2587 ◽  
Author(s):  
K. H. Ryu ◽  
J-M. Yang
Keyword(s):  
Microstructural Characterization ◽  
Degree Of Crystallinity ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sintering Additives ◽  
Transmission Electron ◽  
Wet Chemical ◽  
Si3n4 Ceramics

The characteristics of nanosized silicon nitride powders with doped Y2O3 and Al2O3 fabricated by a plasma-reacted chemical process were investigated. The chemical compositions of the powders were analyzed by wet chemical analysis. The morphology and the size distribution were determined by transmission electron microscopy (TEM). TEM with energy dispersive spectroscopy (EDS) was used to verify the existence of sintering additives in each individual particle. The crystal structure of the powders was identified by the selected area diffraction pattern (SADP). X-ray diffraction (XRD) technique was used for phase analysis and the measurement of degree of crystallinity. The characteristics of chemical bonding was analyzed by using Fourier transform infrared spectroscopy (FTIR).

Study and Characterization of Powders Nanocomposites Calcium Phosphate/Silica-Gel (SiO2n) Obtained from Attrition Milling: For Biomedical Applications

2008 ◽  
Vol 396-398 ◽  
pp. 615-618
Author(s):  
Rodrigo Brandão ◽  
Fernando Pupio ◽  
Nelson Heriberto A. Camargo ◽  
E. Gemelli
Keyword(s):  
Calcium Phosphate ◽  
Silica Gel ◽  
Biomedical Applications ◽  
Bone Matrix ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Attrition Milling ◽  
Bone Calcium

The bioceramics nanostructured have made important characteristics in biomedical applications, especially the calcium phosphate ceramics. The aim of this work is synthesis and characterization of calcium phosphate and nanocomposites powders, the method of dissolution of CaO in liquid medium, precipitation and formation of bone calcium phosphate matrix, and nanocomposites by adding the solution of phosphoric acid (H3PO4). The nanocomposites powders were synthesized using as strengthening silica gel nanometer (20nm) at concentrations of 1%, 2%, 3% and 5% by volume and subjected to heat treatment to 900°C for 2 hours, seeking obtained HA (Hydroxyapatite). Later the bone matrix of calcium phosphate and nanocomposites powders were subjected from process attrition milling for 2 hours, by way of comparison. The studies characterizations were conducted through the technique of X-ray diffraction, scanning electron microscopy (SEM) and dilatometric test.

Fabrication and characterization of n-ZnO nanorods/p-Si (100) heterojunction

2015 ◽  
Vol 24 (04) ◽  
pp. 1550050 ◽  
Author(s):  
Kieu Loan Phan Thi ◽  
Lam Thanh Nguyen ◽  
Anh Tuan Dao ◽  
Nguyen Huu Ke ◽  
Vu Tuan Hung Le
Keyword(s):  
Chemical Method ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Average Height ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Wet Chemical ◽  
Fabrication And Characterization

In this paper, ZnO nanorods were grown by wet chemical method on p-Si (100) substrate to form n-ZnO nanorods/p-Si (100) heterojunction. The optical, electrical, structural properties of n-ZnO nanorods/p-Si(100) heterojunction were analyzed by the photoluminescence (PL) spectroscopy, [Formula: see text]–[Formula: see text] measurement, X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The room temperature PL spectra reveal the good optical property of the heterojunction with strong UV peak at 385[Formula: see text]nm. The ZnO nanorods were vertically well-aligned on p-Si (100) and had an average height of about 1.6[Formula: see text][Formula: see text]m. The n-ZnO nanorods/p-Si (100) heterojunction also exhibits diode-like-rectifying-behavior.

Gahnite compositions compared

1984 ◽  
Vol 48 (348) ◽  
pp. 425-429 ◽  
Author(s):  
Richard A. Batchelor ◽  
Judith A. Kinnaird
Keyword(s):  
Spinel Structure ◽  
Atomic Absorption Spectrophotometry ◽  
Unit Cell Dimension ◽  
Compositional Heterogeneity ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Absorption Spectrophotometry ◽  
The World ◽  
Wet Chemical

Abstract Blue-coloured gem-quality spinel from Nigeria was analysed by wet chemical methods (using atomic absorption spectrophotometry) and investigated by X-ray diffraction. The results showed it to be gahnite (unit cell dimension a=8.091±0.003 Å) containing 36.7% ZnO, 3.58% FeO, and 0.12% MgO. The spinel has an RI of 1.79 and density between 4.4 and 4.59. Broadening of the n[111] XRD reflections indicates a measure of compositional heterogeneity. The gahnite analyses were compared with compositions of zinc spinels from other parts of the world. The analyses cluster into two distinct groups, Mg-rich spinels of metamorphic origin and Mg-poor spinels (including the Nigerian gahnite) with igneous affinities. Diadochy seems to operate within the zinc spinel structure between (Zn + Mn) and (Fe + Mg).

Baustoffanalyse mit Infrarotspektroskopie / Analysis of building materials by infrared spectroscopy

1998 ◽  
Vol 4 (3) ◽  
pp. 209-232
Author(s):  
R. Salzer ◽  
R. Lunkwitz ◽  
T. Braun ◽  
M. Mühle
Keyword(s):  
Building Materials ◽  
Molecular Spectroscopy ◽  
Spectroscopic Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modern Methods ◽  
Wet Chemical ◽  
Ir Spectroscopic ◽  
Instrumental Methods

Abstract Modern methods of instrumental analysis provide very convenient ways to characterize building materials. At present, wet chemical procedures are still in use not only for sample preparation but also for the real investigation. Raster electron microsopy and x-ray diffraction are the preferred instrumental methods of analysis in many places. In this review the high potential of optical molecular spectroscopy for characterization of building materials will be demonstrated by typical examples. Extensive series of wet chemical analysis may be substituted even by a single IR spectroscopic measurement combined with modern procedures of chemometric data evaluation.

Preparation and Characterization of Graphene Nanoplatelet/Magnetite Compound Powders

2011 ◽  
Vol 284-286 ◽  
pp. 464-469
Author(s):  
Guo Hua Chen ◽  
Hai Tao Tang
Keyword(s):  
Room Temperature ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
Graphene Nanoplatelet ◽  
X Ray ◽  
Wet Chemical ◽  
Composition Structure ◽  
Co Precipitation ◽  
Graphite Sheets

Graphene nanoplatelet（GN）/ Magnetite compound powders with magnetite nano-particles coated on the surface of graphite sheets has been successfully prepared by the wet-chemical co-precipitation. The effects of reaction temperature and mole ratio of Fe2+/Fe3+ on ultimate products were investigated. It has been found that excellent magnetite/GN compound powders were obtained at 30 °C with the Fe2+/Fe3+ mole ratio of 5:1. The composition, structure and the electric and magnetic properties of products were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, vibrating-sample magnetometer and four-point probe resistivity measurement.The compound powders have also exhibited the ferromagnetic properties at room temperature.

Characterization of polyherbal-incorporated polycaprolactone nanofibrous mat for biomedical applications

2019 ◽  
Vol 34 (4-5) ◽  
pp. 401-411
Author(s):  
Rajalakshmi Ramamoorthy ◽  
Muthumanickkam Andiappan ◽  
Murugesan Muthalagu
Keyword(s):  
Drug Release ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
Time Intervals ◽  
Drug Release Rate ◽  
Electrospinning Technique ◽  
X Ray ◽  
Thermogravimetric Analyzer ◽  
Physical And Chemical

The polyherbal-loaded polycaprolactone nanofibrous mat was prepared by electrospinning technique, and physical and chemical characteristics of nanofibrous mats were studied using scanning electron microscopy, x-ray diffraction, thermogravimetric analyzer, and Fourier transform infrared spectroscopy. The presence of various phytochemicals in the crude monoherbal and polyherbal extracts was analyzed. The antimicrobial activity and biocompatibility of the polyherbal-loaded nanofibrous mats were studied. The drug release pattern of the polyherbal-loaded nanofibrous mats was studied at different time intervals. The 5% drug-loaded nanofibrous mat shows higher sustainable drug release rate than 1% and 3% drug-loaded nanofibrous mats. The cell viability was found to be 98.91%, 98.77%, 98.5%, and 98.22% for polycaprolactone and 1%, 3%, and 5% for polyherbal-loaded nanofibrous mats, respectively.

Sign in / Sign up

Export Citation Format

Share Document