use of self assembled surfactants for nanomaterials synthesis

... synthesis products were oven dried at 50°C for 12 h The synthesis conditions used with different samples such as, reaction time, alkali hydroxide concentration and NaOH solution volume/mass of ... of the synthesis products obtained by hydrothermal treatment of sugarcane straw ash: TA-1 and TA-3 The high quantity of amorphous material in the SCSA (Figure 1) was found to reduce signals of ... (mL/g) 8 10 10 Sample TA-1 TA-2 TA-3 TA-4 2.3 Characterization of materials The chemical compositions of materials in the form of oxides were analyzed by energy dispersive XRFX-ray fluorescence...

Ngày tải lên: 09/09/2015, 10:32

... interest to utilize EDTA in the synthesis of 1D h-WO3 nanocrystals with different morphologies Therefore, the present work investigates the synthesis of 1D self- assembled h-WO3 nanocrystals using ... Highly oriented 1D nanowires were self- assembled to form nanowire bundles of h-WO3 having a diameter of 100–150 nm and length of 1.5–2.5 ␮m, with individual nanowires of ∼4–6 nm diameter (Fig 2b) ... shown in Fig It is observed that self- assembled nanowires form uniform rod-shaped nanowire bundles The bundle is comprise of several nanowires with uniform diameter of about 4–6 nm along their entire...

Ngày tải lên: 19/03/2014, 16:48

... patterns, bioinformatics is used here for this type of analysis of complex systems Bioinformatics refers to the extraction of biological information from genomic sequence and the reconciliation of multiple ... development of an information base on genetic, cellular, and molecular levels is now a prerequisite for the use of plants or plant cell cultures for biotechnological applications for the following ... accumulation; (2) use of high producer plants for initiation of callus cultures; (3) biochemical analysis of derived cultures for their variability and productivity; (4) establishment of cell suspension...

Ngày tải lên: 25/10/2013, 05:20

... Pseudohypericin, Hyperforin) in St John’s Wort (Hypericum perforatum L.) Hypericum, an extract of the flower of St John’s wort, has been used for the treatment of depression for centuries (Mischoulon, ... tissues (Norn and Kruse, 2004) 264 M McKenzie et al For many centuries, foxglove had been used for various purposes, but had fallen out of use by 1745 due to inappropriate use (Wilkins et al., ... of DNA; (2) oxidations of unsaturated fatty acids in lipids; (3) oxidations of amino acids in proteins; and (4) inactivation of specific enzymes through oxidation of catalytic cofactors Many forms...

Ngày tải lên: 25/10/2013, 05:20

... too few offer strategies for meeting the needs of poor and lower-income people for financial services This paper reviews the experiences of various countries that have made use of one of the few ... similar use of fax machines in Morocco and the United Republic of Tanzania points to the value of establishing mechanisms for fostering the exchange of practical experience in the use of suitable ... otherwise Moreover, use of tax-exempt products, mainly benefiting the well-off, highlights the need for governments to use their ingenuity in devising and enforcing equitable forms of taxation rather...

Ngày tải lên: 15/03/2014, 09:20

... normally used for the synthesis of SiNWs The key point in these two methods is the formation of a sucient amount of silicon atoms and/or silicon oxide clusters in gas phase from the target powders of ... evaporation condition for SiNWs synthesis was the same as that reported previously [8] but with a growth time of 10 The short synthesis time was used so as to study the initial stage of SiNW growth ... show that the surface of the particles is fully covered with selfassembled SiNWs A careful examination of the image at still higher magni®cation (Fig 3d) shows Fig (a) Self- assembled SiNWs are...

Ngày tải lên: 16/03/2014, 15:06

... 266 nm) quality of self- assembled ZnO 3D nanostructure were obtained at pH 10.5 This study was supported by the ERC (Center for Materials and Processes of Self- Assembly) program of MOST/KOSEF (R112005-048-00000-0) ... crystallization and morphology of ZnO nanostructures depend on the initial pH of solution Fig shows the mechanism of ZnO formation in solution at different pH It can be seen that ZnO formation is originated ... frosty with the formation of white precipitates when a small amount ammonia water was added The solution then turned clear after the addition of more ammonia Therefore, the addition of more ammonia...

Ngày tải lên: 06/05/2014, 13:24

... osteotomy of the lower tibia for the deformity (D) Page of (page number not for citation purposes) Journal of Orthopaedic Surgery and Research 2008, 3:13 Angular deformities not remodel and are often ... U-test for quantitative data of the term of bone consolidation and leg-length discrepancy, and using Fisher's exact test for qualitative data of the existence of ankle pain A p value of less ... one was for the initial trial of VFG, and the other was for the second trial of VFG after failure of bone consolidation in ipsilateral VFG Patients The mean age of the patients at the time of VFG...

Ngày tải lên: 20/06/2014, 01:20

... wavelength of the incident neutrons, and θ is the scattering angle The approximation q = 2πθ/l is used for SANS (due to the small angle θ) The analysis of the SANS data suggests that the inner cores of ... viscosity of the alcohol/PAO nanoemulsion fluids is found to be altered significantly because of the dispersed alcohol droplets A commercial viscometer (Brookfield DV-I Prime) is used for the viscosity ... conductivity of aqueous suspensions of carbon nanotubes (carbon nanotubes nanofluids) J Thermophys Heat Transfer 2004, 18:481-485 Hong T, Yang H, Choi CJ: Study of the enhanced thermal conductivity of...

Ngày tải lên: 21/06/2014, 04:20

... The dependence of implantation energy for the formation and evolution of Ge-NCs in these stack structures were studied further Experimental details Before ion implantation, 1.2 nm of SiO2 was thermally ... http://www.nanoscalereslett.com/content/6/1/177 Page of well-isolated Ge-NCs with an average size of 3.5 nm were self- assembled within the top Si3N4 layer at a distance of 5.6 nm from SiN/HfO2 interface A significant memory window of 3.95 ... Effect of ion implantation energy for the synthesis of Ge nanocrystals in SiN films with HfO2/SiO2 stack tunnel dielectrics for memory application Nanoscale Research Letters 2011 6:177 Page of Submit...

Ngày tải lên: 21/06/2014, 05:20

... calculations of three-dimensional spatial distribution of strain components are performed The strain modifies the band structure through the deformation potentials A further numerical analysis of the ... http://www.nanoscalereslett.com/content/6/1/208 Page of for the reverse bias of 1.5 V As shown by the full line, a satisfactory fitting is achieved when one assumes the presence of three transitions (A, B, and C) ... amplitude of 200 mV served as an ac modulation source Various values of reverse dc bias voltage Ub was employed The modulation reflectance of the samples was filtered with a lock-in amplifier before...

Ngày tải lên: 21/06/2014, 05:20

... dependence of the X and XX peaks of the shallow-hole QD of Fig 2a Lines: fits with slope = for the X and slope = for the XX peaks b Position of the X peak maximum of the shallow-hole QD of Fig 2a ... biexciton peaks were identified on basis of their excitation power dependence (Fig 3a), with slope of one for X and of two for XX Polarization-dependent measurements of the neutral exciton and biexciton ... Al droplet formation was initiated by opening the Al shutter for s The temperature was T = 620°C for type I and T = 650°C for type II samples The Al flux corresponded to a growth speed of 0.47 ML/s...

Ngày tải lên: 21/06/2014, 17:20

... exemplary for type I samples and was used for the fabrication of QDs with broadband light emission From earlier results, [20] we know that the formation of flat nanoholes can be suppressed by performing ... temperature for LDE on AlGaAs is about 630° Therefore, for high-temperature fabrication of uniform QDs, the LDE process was performed on more stable AlAs surfaces (type II samples) For AFM characterization, ... fabrication of a novel type of very uniform, strain-free GaAs QDs by filling of LDE nanoholes in AlGaAs with GaAs, has been demonstrated [21] In the present paper we describe the influence of the LDE...

Ngày tải lên: 22/06/2014, 00:20

... source information can be useful for speaker recognition These concerns motivated the use of features that can complement the traditional vocal tract features for a better characterization of the ... changes in the spectrum because of the exponent term α Therefore, although these features quantify the same type of information, their performance may be different for speech signals 2.1 Subband ... distribution of each subband; therefore it has also performed well for the reasons mentioned above Figure 2(c) shows the SBW for each subband as a percentage of all subbands The SFM feature did not perform...

Ngày tải lên: 22/06/2014, 19:20

... that form on top of the strain minima positions Our simulations also produce 30% of double 2D islands aligned along [1–10] that form in the vicinity of the strain energy minima The formation of ... Therefore, a lateral geometry is desirable Recently, we have reported on a simple route to fabricate lateral QD-molecules, based on the use of hierarchical self- assembly In hierarchically selfassembled ... ordered QDs form on top of a ridge structure aligned along [1–10] direction This ridge, which has a width of ~100 nm and a height of ~3 nm above the flat surface, is caused by an overlap of elongated...

Ngày tải lên: 22/06/2014, 22:20

... conditions and could be used as a reliable method for logging changes in plant water status The use of this methodology permits the detection of stresses caused by the presence of pathogens that affect ... growth was 1.57 mm for control plants, 1.44 mm for H mediterraneuminoculated plants and -0.32 mm for those inoculated with B stevensii The growth rate of the stem diameter of the non-inoculated ... sensitivity of LVDT sensors in detecting the real water status of the plant The micrometric measurement of shrinkage and swelling of stem diameter seems to be a sensitive indicator of plant response...

Ngày tải lên: 08/08/2014, 18:21

... of the plant of particular interest for ontogenetic studies; and (ii) to have a more accurate definition of the state or the development stage of organs and tissues for sampling, especially for ... number of buds on September (table II) The date of floral transformation of some of the buds in these radiographs was estimated as being the same as on the excised shoots For the population of buds ... appeared, because of the small doses of radiation accumulated (25 rads for seems h of exposure which represents about 12 to the LD about , 50 20 000 rads for seeds, or to the doses used to induce...

Ngày tải lên: 08/08/2014, 19:21

... right-hand side of the RAM equations, which after canonical transformation is of the form: After each solution of the reduced system of equations, or after each iteration in YQi(P) and YQi(n) of [30] ... univariate systems: DIFFERENT MODELS FOR DIFFERENT TRAITS A third requirement for the applicability of the canonical transformation is the use of the same model for each trait Again, several strategies ... inverse of a full rank submatrix of F’F is used in [66] or an iterative approach is used to obtain A numerical example of the algorithm is given in the Appendix f¿!+1) DISCUSSION The systematic use...

Ngày tải lên: 09/08/2014, 18:22

... largest provider of ART in the area In September, 2004, TASO began providing ART as part of HIV care Registered clients were asked to come forward for screening Eligibility for ART was assessed ... Centers for Disease Control and Prevention and the UK Medical Research Council The contents of this paper are solely the responsibility of the authors and not reflect the official views of the ... numbers in need of treatment would not be considered on the basis of clinical staging [8] The Rakai study used physicians to stage patients, working in a research setting The accuracy of the WHO clinical...

Ngày tải lên: 10/08/2014, 05:21

... impression box and use this to Page of guide the machining of the orthotic This is a fast and inexpensive method of obtaining the shape of the plantar surface of the foot Comparison of foot orthotics ... available for analysis at a convenient time for the researcher There would appear to be scope for the expansion of scanner-based research into the investigation of a range of foot conditions, for example ... application relevant for the design of footwear and orthotic devices For example, the measurement of the change in arch height under different loading can be used to inform the design of the orthotic,...

Ngày tải lên: 10/08/2014, 21:24