yb er nayf4 core shell nanoparticles

... refineries, wastewater, power generation plants, paper and pulp manufacturing, rubber processing, and the fertilizer industry.1 The tolerance limit for Hg(II) discharged into inland surface waters ... Langmuir isotherm models and the thermodynamic properties, including enthalpy, entropy, and Gibbs free energy, were determined from the experimental results 2 Results and discussion 2.1 Characterization ... Figure 4 SEM images of SiO2/CeO2 core shell particles (a, b, c, d) Trang 5and nonuniform layer of CeO2 could be observed The average diameter of CSNs was observed at 600–700nm approximately from...

Ngày tải lên: 13/01/2022, 00:05

... quaternary ammonium This is very different from commonly used cationic materials This property allowed the micelles to have DNA binding ability even in DI water On the other hand, there were tertiary ... formation of the nanoparticles The stability of the micelles in DI water, acidic buffer, PBS buffer and PBS buffer containing serum or BSA of different concentrations was characterized by particle ... higher passive targeting ability than PEI complexes This further evidenced that P(MDS-co-CES) complexes is a very stable DNA carrier Furthermore, the in vivo codelivery of paclitaxel and luciferase...

Ngày tải lên: 16/09/2015, 15:54

... influence of polymer structure on gene transfection level 4.1.6 Thermal properties of the polymers The thermal properties of polymeric materials are a key factor that determines their storage ... to occur at lower temperatures From the cumulative degradation curves of these polymers, there was very small weight loss starting from 100ºC, which was water loss The small water loss shows that ... because of water uptake and ions from the PBS buffer After that, it underwent rapid weight loss At Week 8, its weight loss was about 54% P(MDA-co-CEA) experienced much slower degradation After eight...

Ngày tải lên: 16/09/2015, 15:54

... Thermalgravimetric analysis of the polymers was carried out using a thermogravimetric analyzer (TGA, Perkin Elmer TGA 7, USA) under air, and the temperature rising rate was 20ºC/min The temperature ... P(MDA-co-CEA) were determined by GPC (Waters 2690, MA, USA) with a differential refractometer detector (Waters 410, MA, USA) 10 mg of polymer was dissolved in 5 mL of THF and the solution was then filtered ... vacuum oven overnight to further remove triethylamine Thereafter, the crude product was washed by using ether to remove the oligomers and triethylamine residues and dried under vacuum overnight PEG550-PMDS,...

Ngày tải lên: 16/09/2015, 15:54

... proposed as a drug carrier by Bader et al in 1984 [Bader H., et al 1984] Polymeric micelles exhibit a number of advantages over other forms of drug carriers because of their core-shell structure, low ... CMC and targeting ability 2.1.4.1 Core of polymeric micelles as a reservoir for hydrophobic therapeutics The core of the polymeric micelles can serve as a reservoir for an insoluble drug Incorporation ... narrower than that of the polymer synthesized by anionic polymerization The nanoscale size of the polymer micelles together with the hydrophilic nature of the shell not only allows easy sterilization...

Ngày tải lên: 16/09/2015, 15:54

... Fe3O4-SiO2-GPS-CDI core-shell NPs The evidence of TEM observation of the core-core-shell structures are confirmed after the surface functionalization Despite the presence of thick SiO2 shells on the Fe3O4 cores, ... Fe3O4-SiO2-GPS-CDI core-shell NPs were purified repeatedly by centrifugation, washed several times with acetone, then stored in acetone for later use The synthetic scheme of Fe3O4-SiO2-GPS-CDI core-shell ... form Trang 6Fe3O4-SiO2-GPS-IDA-Zn core-multishell NPs can only bind bovine haemoglobin (BHb protein) rather than bovine serum albumin (BSA) protein [7] Another interesting study revealed that 3-glycidoxypropyltrimethoxysilane...

Ngày tải lên: 17/12/2017, 14:15

... Conclusion Here, we report the development of a surface engineered magnetic core-shell nanoparticle-based drug delivery system designed for aerosol therapy of lung diseases We present a series of ... nebulizer (AeronebWPro nebulizer system, Aerogen, Galway Business Park, Ireland) (volumetric mean diameter 3.65 μm and nebulizer flow rate 0.190 ml/min with normal saline) as per manufacturer’s ... EndoremW, SineremW), give in-formation about tumor angiogenesis, identify dangerous atherosclerosis plaques, follow stem cell therapy, and in other biomedical research [8-11] Further, functionalized...

Ngày tải lên: 02/11/2022, 14:24

... characterization of CaF2:Yb,Er and CaF2:Yb,Er(core)/CaF2(shell) were carried out The comparison of different size of CaF2:Yb,Er(core)/CaF2(shell) and CaF2(core)/CaF2:Yb,Er(shell) were conducted Silica ... different UCNPs systems [20, 36, 53] Based on the previously reported method for preparing core/shell (C/S) UC nanoparticles of NaYF4:Yb,Er [20], CaF2:Yb,Er core and CaF2:Yb,Er/CaF2 core/shell ... CaF2:Yb,Er(core); B-E: CaF2:Yb,Er(core)/CaF2(shell) with different shell thickness (B: ~ 0.8 nm, C: ~ 1.5 nm, D: ~ 2.5 nm, E: ~ 4.4 nm) Insets are the up-conversion luminescence taken by camera...

Ngày tải lên: 16/10/2015, 12:00

... image (inset) of the NaYF4:Yb,Er / NaYF4(core/shell) nanoparticles 40 Figure 3.9 UC luminescence spectra of NaYF4:Yb,Er and NaYF4:Yb,Er / NaYF4(core/shell) nanoparticles under 980nm NIR excitation ... nanoparticles in hexane 38Figure 3.6 Energy level diagram of NaYF4:Yb,Er nanoparticles (versus vacuum) 38 Figure 3.7 XRD powder pattern of the NaYF4:Yb,Er / NaYF4 (core/shell) nanoparticles 39 Figure 3.8 ... (inset) of NaYF4:Yb,Er and NaYF4:Yb,Er / NaYF4 (core/shell) nanoparticles in hexane under 980 nm excitation 41 Trang 13Figure 3.10 An energy level diagram of Yb3+ and Er3+ ions and the upconversion...

Ngày tải lên: 09/09/2015, 10:20

... molecules' steric hindering could increase the diameter by about 2.72 nm Figure 3 shows the XRD powder diffraction patterns of two NPs for the identification of Fe3O4 in core/shell NPs XRD patterns of ... Biol 2010, 12:583 24 Herrmann IK, Urner M, Koehler FM, Hasler M, Roth-Z’Graggen B, Robert N Grass UZ, Beck-Schimmer B, Stark WJ: Blood purification using functionalized core/shell nanomagnets. Small ... displayed excellent reversibility, combined with its superparamagnetic property, enabling the recovery of material and repeated uses for Zn2+ sensing Experimental details Materials and methods ...

Ngày tải lên: 20/06/2014, 20:20

... reveal the spherical shape of nanoparticles with a diameter of about 15 nm, and clearly divulge the core–shell structure of Fe3O4@ CM, with an average core diameter of about 10 nm, and CM shell thicknesses ... (1:2) as eluents The spots were detected either under UV light or by placing in an iodine chamber Melting points were determined in open capillaries using an Elec-trothermal 9100 instrument 1H NMR ... scope, using various catalysts and numerous alternative sub-strates under different reaction conditions, has improved the synthesis of a vast number of DHPM derivatives with enhanced yields In continuation...

Ngày tải lên: 29/05/2020, 13:57

... :Yb,Er upconversion nanoparticles for bio-application, National University of Singapore [3] Bagheri A., Arandiyan H., Boyer C., Lim M (2016), Lanthanide-doped upconversion nanoparticles: emerging ... (2018) dạng lục phương (β-NaYF4:Yb:Er) trong cấu trúc mạng tinh thể vật liệu NaYF4:Yb:Er khi kéo dài quá trình gia nhiệt (trên) giản đồ chuẩn JCPDS No 28-1192 của β-NaYF 4 :Yb:Er, và (dưới) giản đồ ... the materials prepared, ensuing quasi-pure β-NaYF 4 :Yb:Er nanocomposite Keywords: NaYF4 :Yb:Er, β-NaYF 4 :Yb:Er, photoluminescence, upconversion nanocomposite Ngô Thị Mỹ Hòa sinh năm 1996 tại...

Ngày tải lên: 12/06/2021, 10:17

... Chapter and mold applications in near future Face turning experiments are conducted on hardened steel workpiece under different conventional machining parameters In Chapter 7, firstly, cutting energy ... direction in EVC is experimentally investigated by conducting a series of grooving tests using a single crystal diamond tool Then, in order to better understand the surface generation process, a ... Computer numerical control CVC Conventional vibration cutting DOC Depth of cut EDS Energy-dispersive X-ray spectroscopy EVC Elliptical vibration cutting FEM Finite element method ID Inner diameter...

Ngày tải lên: 09/09/2015, 10:21

... ordered mesoporous structure.11 Platinum particles of different sizes were dispersed in a 1:1 mixture of water and ethanol, and mixed with SBA-15 under sonication for h at room temperature After ... proper choice of the inclusion solvent should also be considered In pure water rather than a water/ethanol (1:1) mixture, Pt particles were mainly deposited on the outer surface of SBA-15 after ... Total and reversible isotherms were measured with an interim 1-h evacuation between isotherms The amount of adsorbed gas was extrapolated to zero pressure for all adsorbates Catalysts were reduced...

Ngày tải lên: 08/10/2015, 23:16

... dispersion interactions Repulsive forces, acting over very small intermolecular distances, play a minor role in the cohesion process under normal circumstances Such a negative excess internal ... Chemicals, (India) and E-merck, (Germany), without further purification In all systems, the various concentrations of the ternary liquid mixtures were prepared in terms of mole fraction, out ... the literature has shown that a few attempts have been made to obtain ultrasonic velocity data for ternary liquid mixtures.11–13 However, no thermodynamic studies have been conducted for ternary...

Ngày tải lên: 07/08/2014, 14:20

... difference, equivalent to an NNT of 8, was clinically useful This better efficacy came with lower mortality, fewer hospital admissions, and lower rates of several adverse events, including severe ... mentioned in 10, reduced corticosteroid dose in 7, with each mentioning reduced serum creatinine and disease severity or increased serum albumin Where numerical data were given, reduction in urinary ... magnitude; average reductions were often The number of days spent in hospital was per patient per year with MMF or azathioprine in the maintenance trial [39] compared with 10 per patient per year...

Ngày tải lên: 09/08/2014, 08:23

... to IUCN Bruguiera hainesii, CHAPTER1 Bruguiera sexangula, Ceriops decandra Kandelia obovata and many other mangrove plants were said to be extinct and later they have been rediscovered in Singapore ... i heterologous expression in Xenopus laevis oocyte ii ectopic expression in Arabidopsis 19 CHAPTER CHAPTER Materials and methods 20 CHAPTER Chapter : Materials and methods 2.1 Plant materials ... 60–90% relative humidity; 12h photoperiod) and watered every alternate day with NaCl-free water Figure 2.1: Mangrove swamp near Berlayer Creek Singapore 21 CHAPTER Arabidopsis growth conditions...

Ngày tải lên: 09/09/2015, 08:13

... lower-layer clay cu2* Strength of lower-layer clay at depth of ‘dummy’ spudcan cu2,0 Strength at the uppermost level of lower-layer clay cu,avg Average of strengths of upper- and lower-layer clay ... interpreted as follows In the first test where the lower layer is significantly softer than the crust layer, there is greater tendency for the crust material to flow downwards into the underlying ... two-layer clay specimens 28 Chapter Literature Review Four different preparations of two-layer (stiff-over-soft) clay specimens were described in four different studies: 1) Brown & Meyerhof (1969)’s,...

Ngày tải lên: 10/09/2015, 15:54

... effect temperature, J kg-1 t Heterogeneity parameter (Eqn 3.8) - T* equilibrium temperature K TA Thermo acoustic - TE Thermoelectric - u specific internal energy J kg-1 U v overall heat transfer coefficient ... evaporating temperature equal to 25 °C and regeneration temperature difference (the difference between regeneration and ambient temperatures) equal to 65 °C, the experimental COP of the intermediate ... internal energy) The entropy (s), enthalpy (h), and internal energy (u) are described in term of pressure (P), temperature (T), and the amount of adsorbate uptake or surface coverage (q), where...

Ngày tải lên: 11/09/2015, 10:01

... characteristic between core- shell SiNW and x planar Si solar cell under AM 1.5G illumination (c) Comparison of dark I-V characteristics between core- shell SiNW and planar Si solar cell in reverse ... Diameter of nanowire ɛ Permittivity η, ηPV Power conversion efficiency of photovoltaic device E Incident photon energy Eg Band gap I Terminal current I0 Dark saturation current IL Light generated ... to larger light generated current and higher PCE in solar cells with surface nanostructures as compared to planar Si solar cell 1.4.2 Core- shell SiNW solar cell SiNW solar cells with core- shell...

Ngày tải lên: 12/10/2015, 17:35