Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/44785
Title: Structure of reverse microemulsion-templated metal hexacyanoferrate nanoparticles
Author: Bravo-Anaya, L.M.
Macias, E.R.
Hernandez-Lopez, J.L.
Fernandez-Escamilla, V.V.
Carreon-Alvarez, A.
Rodriguez, J.R.
Soltero, J.F.A.
Larios-Duran, E.R.
Issue Date: 2014
Abstract: This work presents an original adsorption study of calf-thymus DNA molecules monitored by Electrochemical Impedance Spectroscopy (EIS) and Surface Plasmon Resonance (SPR) as a function of DNA concentration at a constant pH of 7.3 and room temperature (25 1 °C). Since EIS measurements were carried out at open circuit potential, there was an adsorption process of DNA molecules at the electrode surface. This enabled Cdl values to be obtained by using an equivalent circuit similar to the one proposed by Frumkin-Melik-Gaikazyan-Randles (FMGR). Values of optical film thickness (d opt) of adsorbed DNA molecules were estimated by using SPR measurements. The variations of the dopt as a function of DNA concentration (cDNA) can be related to transitions in the structural arrangement of the electrochemical double-layer, presumably caused by DNA conformational changes observed at two critical cDNA, i.e. c* and ce, known as the overlap and entanglement concentrations, respectively. A linear behavior was observed in each regime, in which the relation between dop and cDNA followed the power law according to: dilute regime (cDNA < c*): dopt ? cDNA 0.20, semi-dilute regime without entanglements (c* < cDNA < ce): dopt ? c DNA 0.79and semi-dilute regime with entanglements (c e < cDNA): dopt ? cDNA 0.57. Through dopt and Cdl values, a dielectric constant behavior as a function of DNA concentration was obtained, showing DNA transitions passing from diluted, semi-diluted unentangled and semi-diluted entangled solutions. " 2014 Elsevier Ltd. All rights reserved.",,,,,,"10.1016/j.electacta.2014.02.056",,,"http://hdl.handle.net/20.500.12104/44785","http://www.scopus.com/inward/record.url?eid=2-s2.0-84901203779&partnerID=40&md5=adca347d511852d00501526cf2c30a07",,,,,,,,"Electrochimica Acta",,"60
70",,"131",,"Scopus
WOS",,,,,,"dielectric constant; DNA; DNA transitions; double-layer capacitance; optical film thickness",,,,,,"Structural Behavior of Au-Calf Thymus DNA Interface Estimated Through an Electrochemical Impedance Spectroscopy and Surface Plasmon Resonance Study",,"Article" "46554","123456789/35008",,"Azúa, B.M., Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; DeMets, C., Department of Geology and Geophysics, UW-Madison, Madison, WI, United States; Masterlark, T., U.S. Geological Survey, EROS Data Center, Raytheon, Sioux Falls, SD, United States",,"Azua, B.M.
DeMets, C.
Masterlark, T.",,"2002",,"Continuous GPS measurements from Colima, Mexico during 4/93-6/01, bracketing the Oct. 9, 1995 M = 8.0 Colima-Jalisco earthquake, provide new constraints on Rivera plate subduction mechanics. Modeling of margin-normal strain accumulation before the earthquake suggests the Rivera-North America subduction interface was fully locked. Transient postseismic motion from 10/ 95-6/97 is well fit by a model that includes logarithmically-decaying fault afterslip, elastic strain from shallow fault relocking, and possibly a minor viscoelastic response, but is fit poorly by models that assume a dominant Maxwell viscoelastic response of the lower crust and upper mantle, independent of the assumed viscosities. Landward, margin-normal motion since mid-1997 is parallel to but ? 75% slower than the pre-seismic velocity. Afterslip alone fails to account for this slowdown. The viscoelastic response predicted by a FEM correctly resolves the remaining velocity difference within the uncertainties. Both processes thus offset elastic strain accumulating from the relocked subduction interface.",,,,,,,,,"http://hdl.handle.net/20.500.12104/44775","http://www.scopus.com/inward/record.url?eid=2-s2.0-35549013979&partnerID=40&md5=ce16b3444a3bc09101edc1068f36664a",,,,,,"8",,"Geophysical Research Letters",,"122
1 - 122-4",,"29",,"Scopus
WOS",,,,,,,,,,,,"Strong interseismic coupling, fault afterslip, and viscoelastic flow before and after the Oct. 9, 1995 Colima-Jalisco earthquake: Continuous GPS measurements from Colima, Mexico",,"Article" "46560","123456789/35008",,"Vázquez, C.R., Centro Universitario de los Valles, Universidad de Guadalajara, Carretera Guadalajara-Ameca, C.P. 46600 Ameca, Jalisco, Mexico; Ramírez-Treviño, A., Centro de Investigacion y Estudios Avanzados Unidad Guadalajara, Av. del Bosque 1145, C.P. 45019 Zapopan, Jalisco, Mexico",,"Vazquez, C.R.
Ramirez-Trevino, A.",,"2012",,"Controllability of timed continuous Petri nets (TCPN) is studied in this work. The analysis addressed here may lead to control algorithms for systems modeled with TCPNs, for instance, manufacturing systems, supply chains, etc. The goal in this work is to provide structural and generic conditions for the verification of the controllability property. In particular, it is proven that for the net subclass of Topological Equal Conflict net systems the controllability may be determined by the structure, being independent of the timing of the transitions.",,,,,,,,,"http://hdl.handle.net/20.500.12104/44781","http://www.scopus.com/inward/record.url?eid=2-s2.0-84881078886&partnerID=40&md5=12fde55ddb344965342989a3f9d2b698",,,,,,,,"IFAC Proceedings Volumes (IFAC-PapersOnline)",,"41
46",,,,"Scopus",,,,,,"Controllability; Hybrid systems; Petri-nets",,,,,,"Structural and generic conditions for controllability of timed continuous Petri nets",,"Conference Paper" "46581","123456789/35008",,"Gutiérrez-Becerra, A., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico; Barcena-Soto, M., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico; Soto, V., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico; Arellano-Ceja, J., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico; Casillas, N., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico; Prevost, S., Stranski-Laboratorium for Physikalische und Theoretische Chemie, Institut for Chemie, Technische Universityt Berlin, Strasse des 17. Juni 124, Sekr. TC7, Berlin, 10623, Germany; Noirez, L., Laboratoire León Brillouin (CEA-CNRS), CEA Saclay, Gif-sur-Yvette, 91191, France; Gradzielski, M., Stranski-Laboratorium for Physikalische und Theoretische Chemie, Institut for Chemie, Technische Universityt Berlin, Strasse des 17. Juni 124, Sekr. TC7, Berlin, 10623, Germany; Escalante, J.I., Chemistry Department, University of Guadalajara, Boul. M. García Barragán # 1451, Guadalajara, Jalisco, 44430, Mexico",,"Gutierrez-Becerra, A.
Barcena-Soto, M.
Soto, V.
Arellano-Ceja, J.
Casillas, N.
Prevost, S.
Noirez, L.
Gradzielski, M.
Escalante, J.I.",,"2012",,"The droplet phase of a reverse microemulsion formed by the surfactant cetyltrimethylammonium ferrocyanide was used as a matrix to synthesize nanoparticles of nickel hexacyanoferrate by adding just a solution of NiCl 2 to the microemulsion media. Dynamic light scattering and small-angle neutron scattering measurements show that the reverse microemulsion droplets employed have a globular structure, with sizes that depend on water content. Transmission electron microscopy and electron diffraction are used to obtain information about the structure of the synthesized nanoparticles. The results show that the size and shape of the coordination compound nanoparticles correspond with the size and shape of the droplets, suggesting that the presented system constitutes an alternative method of the synthesis of metal hexacyanoferrate nanoparticles. " 2012 Gutiérrez-Becerra et al.
URI: http://hdl.handle.net/20.500.12104/44802
http://www.scopus.com/inward/record.url?eid=2-s2.0-84857708427&partnerID=40&md5=3836a5da376140ea511dd4c6dee68021
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