green synthesis and characterizations of silver and gold nanoparticles

... and Fig 3.21c) 3.2.2 Effect of silver nanoparticles on growth and development of cyanobacteria M aeruginosa KG and green algae C vulgaris 3.2.2.1 Effect of silver nanoparticles on growth and ... library of the Graduate University of Science and Technology - National Library of Viet Nam Trang 3INTRODUCTION OF THESIS 1 The necessary of the thesis In recent years, pollution of soil, water and ... culture of algae, selection of nanomaterials, evaluation of the material toxicity, the evaluation of the influence of nanomaterial sizes and the safety of nanomaterials on microalgae and the

Ngày tải lên: 09/01/2020, 15:22

... and Fig 3.21c) 3.2.2 Effect of silver nanoparticles on growth and development of cyanobacteria M aeruginosa KG and green algae C vulgaris 3.2.2.1 Effect of silver nanoparticles on growth and ... library of the Graduate University of Science and Technology - National Library of Viet Nam Trang 3INTRODUCTION OF THESIS 1 The necessary of the thesis In recent years, pollution of soil, water and ... culture of algae, selection of nanomaterials, evaluation of the material toxicity, the evaluation of the influence of nanomaterial sizes and the safety of nanomaterials on microalgae and the

Ngày tải lên: 15/01/2020, 09:28

... catalysts Effect of reaction substances (TEOS, NH4OH, APTES and water) ratios on the perform of CdTe@SiO2 nanoparticles and their optical propeties were investigated The size of CdTe@SiO2 nanoparticles ... amounts of other substances is given in Table 2 Fig 6 Comparison of fluorescence spectra of CdTe @ SiO2 nanoparticles with catalyst content of 200 and 400 µl versus the fluorescence spectra of uncoated ... their Stöber method They presented effect concentration of TEOS and concentration of NaOH on formation process of silica shell and properties of SiO2 coated quantum dots [25, 26, 27], but they have

Ngày tải lên: 27/09/2020, 17:52

... distribution of silver (Fig 4c) and gold (Fig 4h) in the isolated nanoparticles The elem-ental distributions of silver and gold were evidently dis-cernible from Fig 4b, g; silver and gold were found ... nano-particles by green chemistry, we reported for the first time a rapid and green synthesis of silver (DH-AgNps) and gold nanoparticles (DH-AuNps) known as the roots of Angelica pubescens Maxim f of A pubescens ... show the effect of silver and gold salt con-centration on the synthesis of nanoparticles at 50% (v/v) root extract concentration and 80 °C The sharpest and best peaks for DH-AgNps and DH-AuNps were

Ngày tải lên: 19/11/2022, 11:46

... http://creativecommons.org/licenses/by-nc-nd/4.0/) Green synthesis and chemometric characterization of hydrophobic xanthan matrices: Interactions with phenolic compounds Department of Chemistry, University of Navarra, 31080 ... average masses of about 10,000 Da, and a wide diversity of chemical groups (phenolic, hydroxyl, methoxy, …) It is mainly composed of three types of blocks: p-hydroxyphenyl, guaiacyl and syringyl ... the ratio of 1710 cm− 1, and 1710 cm− 1 plus 1010 cm− 1 bands fSorption capacity (mg/g) of 1-naphthol using 2, 20 and 200 mg/L as initial concentrations, respectively *The degree (%) of esterification

Ngày tải lên: 01/01/2023, 13:36

... nanowires with diameter of 200 nm and length of 5mm were electrochemically synthesized on the gold surface of interdigitated electrodes and subsequently deco-rated with 20 nm gold nanoparticles Electrochemical ... estimation of detection limit, we have proposed a novel approach for the calculation of the limit of detection Limits of detection of 60.0 fM for the differential voltage method and of 84.5 fM ... of arm 1 (and arm 2) and not on fingers of arm 4 (and arm 3) (b) The SEM result corresponding to the connection configuration (ii) in Fig 2 c: PPy nanowires appear on all fingers of the 4 arms and

Ngày tải lên: 27/01/2021, 06:01

... nanowires with diameter of 200 nm and length of 5mm were electrochemically synthesized on the gold surface of interdigitated electrodes and subsequently deco-rated with 20 nm gold nanoparticles Electrochemical ... estimation of detection limit, we have proposed a novel approach for the calculation of the limit of detection Limits of detection of 60.0 fM for the differential voltage method and of 84.5 fM ... of arm 1 (and arm 2) and not on fingers of arm 4 (and arm 3) (b) The SEM result corresponding to the connection configuration (ii) in Fig 2 c: PPy nanowires appear on all fingers of the 4 arms and

Ngày tải lên: 17/03/2021, 20:11

... coefficient value of the AuNPs changes depending of the size of AuNPs.41,42 The quality of the water, magnetic stir bars, and clean equipment used in the synthesis of the AuNPs influence their synthesis ... status of the AuNPs in a suspension On the binding of P23 to the AuNP surface a 5–6-nm red shift occurred The SPR red shift of P23 is larger than that of P2 because of the net charge of P2 (+2.0) and ... of the cluster and the individual NPs, one can roughly estimate the number of monomers in the cluster from the radius of gyration of the cluster and individual NPs: n = (Rg/Rsingle)3 The Rg and

Ngày tải lên: 12/01/2022, 23:16

... B.D Du, N.Q Hien, Synthesis of gold nanoparticles with seed enlargement size by α-irradiation and investigation of antioxidant activity, Colloids and Surfaces A: Physicochemical and Engineering ... form containing three main components of S platensis, gold nanoparticles, and vitamin C combinated with PVP binder has a potential applications in the field of cosmetics, especially for facial ... The combination of the mixture and the polyvinylpyrrolidone (PVP) binder was sterilized by gamma Co-60 radiation The sterilization dose of 16 kGy was selected due to theabsence of aerobic microorganisms

Ngày tải lên: 19/02/2023, 21:51

... of Fe3O4 nanoparticles was separated from solution by external magnetic field and washed several times by deionized water and acetone 2.3 Synthesis of Ag Nanoparticles by Tollens Process The silver ... these challenges, hybrid nanoparticles of silver nanoparticles and magnetic oxide nanoparticles (i.e., Fe3O4, Fe2O3) were studied for enhanc-ing antibacterial activity and high compatibility with ... schematic process for synthesis of Fe3O4–Ag hybrid nanoparticles was shown in Figure 1 First, 30 mg of the Fe3O4 nanoparticles were added to 100 mL of deionized water together with 3 mL of acid oleic

Ngày tải lên: 01/09/2017, 12:48

... T m of Ag, Au and Cu metals Melting temperature T0and Gr¨uneisen parameterγ0of Ag at ambient pressure are 1234.93 K and 2.65,32respectively; q is assumed to equal to 1 The values of T0, and fitting ... reported by Akella and Kennedy.11 According to Akella and Kennedy, the initial melting slopes of Ag is 60.4 K/GPa, while the result of Mirwald et al.12 and Errandonea13 are 64.7 K/GPa and 47 K/GPa, ... the slopes of melting curves Experimental melting slopes of Errandonea, Mirwald et al and Akella and Kennedy are dT m /dP= 47(3) K/GPa, 57 K/GPa and 57.3 K/GPa, subsequently Slopes of melting

Ngày tải lên: 16/12/2017, 00:14

... including instructions for authors and subscription information: http://www.tandfonline.com/loi/tjen20 Synthesis and antimicrobial effects of colloidal silver nanoparticles in Dang Van Phu a , ... purpose of the Content Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis The accuracy of ... Conditions of access and use can be found at http://www.tandfonline.com/page/terms-and-conditions Trang 3Journal of Experimental NanoscienceVol 5, No 2, April 2010, 169–179 Synthesis and antimicrobial

Ngày tải lên: 16/12/2017, 01:27

... ACCADEMY OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY INTITUTE OF PHYSICS -*** - DO THI HUE SYNTHESIS AND OPTICAL PROPERTIES OF GOLD NANOSTRUCTURES SPHERICAL, ROD AND ... Methods for making gold nanoparticles 1.2.3 Synthesis of gold nanorods 1.2.4 Synthesis of nano core/shell SiO2/Au 1.3 Application of gold nanostructures 1.3.1 Bio-marking and imaging Trang ... of the interaction between electromagnetic waves and large metal nanoparticles Chapter 3: Synthesis and optical properties of gold nanoshell SiO2/Au 3.1 Materials and methods 3.2 Synthesis of

Ngày tải lên: 09/01/2020, 15:38

... precursor for synthesis of silver nanoparticles Trang 3Synthesis of silver nanoparticles from culture filtrates of T asperellum Synthesis of silver nanoparticles was done by standardized method ... method of Heath and Packer (1968) Results and Discussion Fungus mediated green synthesis of silver nanoparticles Trichoderma asperellum was purposefully selected for synthesis of silver nanoparticles ... formation of silver nanoparticles was monitored by using UV-Vis spectroscopy Characterization of silver nanoparticles Characterization of silver nanoparticles was done by different type of equipments

Ngày tải lên: 14/01/2020, 01:33

... ACCADEMY OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY INTITUTE OF PHYSICS -*** - DO THI HUE SYNTHESIS AND OPTICAL PROPERTIES OF GOLD NANOSTRUCTURES SPHERICAL, ROD AND ... Methods for making gold nanoparticles 1.2.3 Synthesis of gold nanorods 1.2.4 Synthesis of nano core/shell SiO2/Au 1.3 Application of gold nanostructures 1.3.1 Bio-marking and imaging Trang ... of the interaction between electromagnetic waves and large metal nanoparticles Chapter 3: Synthesis and optical properties of gold nanoshell SiO2/Au 3.1 Materials and methods 3.2 Synthesis of

Ngày tải lên: 15/01/2020, 10:38

... formula Mortality percentage = No of larvae killed / Total No of Larvae tested X 100 Results and Discussion Synthesis of Silver Nanoparticle Synthesis of silver nanoparticles were done using the ... reduction of silver metal into silver nanoparticles The suspension was completely dried on hotplate and powder form of the silver nanoparticles were collected Identification and characterization of ... the synthesis of nanoparticles Nature has opened several ways for fabricating nanoparticles in smaller size In 1999, Klaus and his co-workers demonstrated bacterial mediated biosynthesis of nanoparticles

Ngày tải lên: 17/03/2020, 20:11

... nanofabricator Pandey (2012) reported the use of M charantia extract for the facile synthesis of ultra-stable gold nanoparticles Similarly, the green synthesis of silver nanoparticles in bitter gourd extract ... Hinge, S., Singh, L and Nalwade, A 2014 Green synthesis of silver nanoparticles using fruit extract of bitter gourd and evaluation of their antibacterial activity against human and plant pathogenic ... Green synthesis of highly stable gold nanoparticles using fabricator Archives of Appl Sci Res., 2(2):1135-1141 Parekh, J and Chanda, S 2007 In-vitro screening of antibacterial activity of aqueous

Ngày tải lên: 02/07/2020, 23:16

... Trang 162 Original Article Metal Complexes of π-Expanded Ligands (4): Synthesis and Characterizations of Copper(II) Complexes with a Schiff Base Ligand Derived from Pyrene Luong Xuan Dien1,2,, ... and structural properties of the salicylaldiminato-type copper(II) complex 2 2 Results and Discussion 2.1 Synthesis and MS Analysis The syntheses of the ligand (1) and the corresponding copper(II) ... Figure 5, the β-HOMO of 2 is far higher in energy than that of 4 (-4.73 eV instead of 5.21 eV) and the β-LUMO of 2 is also far lower in energy than that of 4 (-2.15 eV instead of -1.87 eV) Thus,

Ngày tải lên: 09/08/2020, 17:08

... using of silver nanoparticles and bio-factors for wound healing 17 CHAPTER 2: MATERIALS AND METHODS 19 2.1 Overview of experimental design 19 2.2 Preparation of AgNPs 20 2.2.1 Synthesis of AgNPs ... studied the impact of size and coating on cytotoxicity and genotoxicity of 6 AgNPs types including PVP- and citrate-coated (20, 50, 100 nm) and silver nitrate (PVP)-in L5178Y and TK6 cells The ... Alcohol Bactericidal action of an aqueous solution of 70% - 92% alcohol is rapid, but short-time action, and can cause irritation and dryness [56] Nanoparticles: silver, gold, zinc (NPs) NPs exhibit

Ngày tải lên: 04/09/2020, 08:39

... using of silver nanoparticles and bio-factors for wound healing 17 CHAPTER 2: MATERIALS AND METHODS 19 2.1 Overview of experimental design 19 2.2 Preparation of AgNPs 20 2.2.1 Synthesis of AgNPs ... (2016)studied the impact of size and coating on cytotoxicity and genotoxicity of 6 AgNPstypes including PVP- and citrate-coated (20, 50, 100 nm) and silver nitrate inL5178Y and TK6 cells The results ... HOAI STUDY ON SYNTHESIS OF COMBINATION OF SILVER NANOPARTICLES AND MESENCHYMAL STEM CELL PRODUCTS FOR WOUND HEALING MAJOR: NANOTECHNOLOGY CODE: 8440140.11QTD RESEARCH SUPERVISORS: Prof Dr Sc NGUYEN

Ngày tải lên: 27/10/2020, 19:58