The book ” Bio-Nanotechnology for Sustainable Environmental Remediation and Energy Generation“, edited by the Academia Colombiana de Ciencias Exactas Físicas y Naturales and the Nanoscale Science and Technology Center -NanoCiTec-, contains contributions from FEALAC member countries on energy and environment from the opportunities offered by bio and nanotechnology. Read more…
The launch of the book was made last Dec. 2 in the framework of the International Meeting on Bio-Nanotechnology: Energy and Environment.
E. González, E. Forero (Eds). Bio-Nanotechnology for Sustainable Environmental Remediation and Energy Generation. ACCEFYN & NanoCiTec, Bogotá, 2016.
In this study, the role of bio and nanotechnology to resolve the problems of contamination by heavy metals and sustainable energy production in the context of cooperation opportunities in research and development between FEALAC countries was performed.
Montenegro, I.; González, E.; Botero, M. Opportunities for Joint Cooperation in R&D for FEALAC Countries: On Nanotechnology and Biotechnology. STI Policy Review. 7(2016)106.
With carbon nanotubes a filter capable of detecting and selectively bind mercury as part of a system of pre-treatment to be implemented in surface plasmon sensors was developed. This filter was part of the Master thesis of the student Yulieth Reyes . These filters allow passage and selective retention of chemical entities, aspect of great importance for the design and manufacture of systems for treatment of contaminated water.
 Reyes, C.; Coy, E.; Yate, L.; González, E. Nanostructured and selective filter to improve detection of arsenic on surface plasmon nanosensores. ACS Sensors.(2016) DOI: 10.1021/acssensors.6b00211
In order for two metals can form an alloy, it is required that such material is in liquid phase. However, not always the metals in a liquid phase can form alloys. When this happens, a miscibility gap is formed. The binary phase diagram (adapted from Massalski, T. B.; Murray, J. L.; Bennett, et al. Binary Alloy Phase Diagrams. American Society for Metals: Metals Park, Ohio, 1986.) illustrates the ratio between silver and platinum in terms of temperature. The miscibility gap appears to temperatures above 400 oC between Ag2Pt98 and Ag95Pt5. Recent research has shown that the nanoscale materials are capable to reduce the miscibility gap for the same temperature conditions with respect to macroscale.
Thus, in the case of silver and platinum, has succeeded in producing alloy nanoparticles formed by these two metals at room temperature. The walls of these nanoparticles are formed by a Ag/Pt alloy while a layer of platinum on the surface is achieved with a high crystallographic index. As is well known, this condition gives the particle high catalytic capacity. These results allow, among other important applications, the manufacture of electrodes for fuel cells with reduced amounts of platinum and suitable morphology to increase the catalytic activity.
González, E.; Merkoci, F.; Arenal, R. et al. Enhanced reactivity of high-index surface platinum hollow nanocrystal. J. Mater. Chem. A. 4 (2016) 200-2008.
NanoTech Japan is undoubtedly the most important event in nanotechnology around the world. In its fourteenth edition it received about 50,000 visitors and a number close to 600 stands. Colombia (first time) with the United States and Canada were the participants for the American continent in this important event.
Researchers Francisco Gonzalez and Edgar Gonzalez, by I2Dnano and nanoCiTec’s PIs presented the development of three new nanomaterials designed with multitasking capabilities for medical diagnosis and treatment (that can be used to theranostic applications). By this development I2Dnano received the Special Award. Professor Shinji Matsui of the Laboratory for Advanced Science and Technology Industry in ceremony on January 30 hands out the award to Edgar González.
“A careful examination of your nanotechnology exhibit found it to be particulary excellent and therefore it is our great honor to present you with this award.”
Prof. Tomoji Kawai, Chairman, nano tech executive committe.
Researchers have successfully developed a new synthesis method for producing a wide variety of complex hollow nanoparticles. The method applies Kirkendall and galvanic exchange in a novel manner to produce highly complex nanostructures. These nanomaterials can be used for design and configuration of sensors, vehicles for drug delivery, controlled nanoscale reactions, nanoantennas, etc.
Gonzalez, E.; Arbiol, J.; Puntes, V.F. Carving at the Nanoscale: Sequential Galvanic Exchange and Kirkendall Growth at Room Temperature. Science. 334 (2011)1377 DOI: 10.1126/science.1212822
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