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MIT Innovator LATAM and VISIONARY of the YEAR |

Dr. Jaime Andrés Pérez Taborda, from Colombia, was recognized as “Visionary of the Year”  for his collaborative project to monitor water quality in remote communities, holding private businesses and governmental institutions responsible for their water waste.

Polluted water causes more than 500,000 deaths by diarrhea a year, according to the World Health Organization (WHO). Concretely, numerous cities in Colombia suffer from water pollution by mercury due to mining, according to The Colombian Environmental Information System. Between 2003 and 2013, 1,020 tons of mercury were bought in the country for internal use.

With the objective of knowing the quality of water in remote zones of Colombia, a PhD in physics and researcher of the University of the Andes, Colombia, Jaime Andrés Pérez, collaborates in a project to assist citizens with monitoring water quality in rural zones all over Colombia. Thanks to this initiative, Pérez has become a winner in the Latin American Innovators Under 35 from the MIT Technology Review LATAM edition.

In order for the monitoring to take place, the project has four types of low cost probes. The first one can only measure the temperature and electric conductivity. The newest model, aside from the previous, is also able to take pH, diluted oxygen, turbidity measurements, apparent color, and metal concentration such as cadmium, lead, mercury, and arsenic. To avoid using batteries that could pollute the water and increase cost, the project uses probes that are nurtured by thermoelectric and piezo: nano-generators since the differences in temperature and movement of the rivers generate electricity.

Energy & sustainability – Jaime Andrés Pérez Taborda

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Community platform for monitoring water quality in the Samacá-Boyacá region: Socialization Workshop

Last Saturday, September 21, the first Socialization Workshop was held in the municipality of Samacá, Boyacá with the community of the project entitled: “Community platform for monitoring water quality in the Samacá-Boyacá region”.

This project is part of the 12 selected in the 794  call of 2017 made by Colciencias and part of the Boyacá Bio program, promoted by the Government of Boyacá, Colombia. The project is made up of an Alliance between the Santo Tomás University, Germán Franco Carbón S.A.S. and the University of the Andes.

The Uniandes work team is made up of the professor of the Department of Electrical and Electronic Engineering Dr. Alba Avila, Juan Manuel Alberto Lovera Lozano double degree student in Systems and Computing Engineering – Electronic Engineering and the researcher of the Department of Electrical Engineering and Electronics Dr. Jaime Andrés Pérez-Taborda.


Source: https://iee.uniandes.edu.co/es/home/9-espanol/departamento/noticias/671-uniandes-presente-en-taller-de-socializacion-en-samaca-boyaca




(EN) The present invention relates to a method for the physical synthesis of metallic nanoparticles, which comprises: (a) depositing a metallic film on a substrate of irregularly oriented salt crystal; and (b) heat-treating the metallic film deposited on the substrate until metallic nanoparticles form. This method makes it possible to obtain nanoparticles that are immobilised on a substrate and completely free of stabilising agents or surface ligands, in addition to nanoparticles in suspension or dry nanoparticles. The method also enables the production of nanoparticles having different sizes and diverse morphologies by adjusting the surface characteristics of the substrate, the characteristics of the metallic film and the thermal conditions established during the nanoparticle formation steps.
(ES) El presente desarrollo se refiere a un método de síntesis física de nanopartículas metálicas que comprende a) depositar una película metálica sobre un sustrato de cristal de sal orientada irregular y b) tratar térmicamente la película metálica depositada sobre el sustrato hasta la formación de nanopartículas metálicas. Este método permite obtener nanopartículas inmovilizadas sobre un sustrato completamente libres de agentes estabilizantes o de ligandos en superficie, además de nanopartículas en suspensión o nanopartículas secas. Asimismo, el método para obtener nanopartículas de diferentes tamaños y diversas morfologías a partir del ajuste de las características superficiales del sustrato, de las características de la película metálica y de las condiciones térmicas establecidas durante las etapas de formación de las nanopartículas.

The disconnection between artificial intelligence engineering research and sustainable development

Artificial intelligence (AI) has the potential to contribute to solving some of the most pressing societal issues of our time, but to what extent are engineers reflecting on the uses of their technologies for sustainable development, and who is producing the engineering knowledge behind AI?


Our most recent paper: Valence State Tuning of Gold Nanoparticles in the Dewetting Process: An X-ray Photoelectron Spectroscopy Study


Gold nanoparticles (AuNPs) are commonly synthesized using the citrate reduction method, reducing Au3+ into Au1+ ions and facilitating the disproportionation of aurous species to Au atoms (Au0). This method results on citrate-capped AuNPs with valence single states Au0. Here, we report a methodology that allows obtaining AuNPs by the dewetting process with three different valence states (Au3+, Au1+, and Au0), which can be fine-tuned with ion bombardment. The chemical surface changes and binding state of the NPs were investigated using core-level X-ray photoelectron spectroscopy (XPS). This is achieved by recording high-resolution Au 4f XPS spectra as a function of ion dose exposure. The results obtained show a time-dependent tuning effect on the Au valence states using low-energy 200 V acceleration voltage Ar+ ion bombardment, and the valence state conversion kinetics involves the reduction from Au3+ and Au1+ to Au0. Proper control of the reduction in the valence states is critical in surface engineering for controlling catalytic reactions.


New REVIEW: Tug-of-War in the Selection of Materials for Battery Technologies

We are very excited to share that our review Tug-of-War in the Selection of Materials for Battery Technologies has just been published MDPI https://mdpi.com/1792914 #mdpibatteries#Batteries are the heart and the bottleneck of portable electronic systems. This review studies material used in the four battery components from the perspective and the impact of seven ions (Li+, Na+, K+, Zn2+,Ca2+, Mg2+,andAl3+), employed in commercial and research batteries.

In addition, critical factors of sustainability of the supply chains—geographical raw materials origins vs. battery manufacturing companies and material properties (Young’s modulus vs. electric conductivity)—are mapped.

Our most recent article published in Nanoscale Advances

One of the important challenges of the #4IR is to provide #energy autonomy to billions of IoT #SDG7. #Thermoelectric materials can play a key role in this. But first, it is necessary to reduce its #thermalConductivity. (SThM) is a powerful technique for thermal characterization. However, one of the most challenging aspects of thermal characterization is obtaining quantitative information on thermal conductivity with nanoscale lateral resolution.

L. Vera, A. Ruiz de Clavijo, J. A. PEREZ TABORDA and M. S. Martín-González, Nanoscale Adv., 2022, DOI: 10.1039/D2NA00287F.

Investigador Senior (IS) 2022 Minciencias

Excelentes noticias. En su última clasificación nacional de investigadores el Ministerio de Ciencia, Tecnología e Innovación ha catalogado al profesor Jaime Andrés Pérez en su máxima categoría: Investigador Senior. Esto es especialmente importante de cara a liderar desde Research group – (NANOUPAR) Nanostructures and Applied Physics Group en la UNIVERSIDAD NACIONAL DE COLOMBIA, Sede de La Paz los proximos proyectos de largo aliento. Vamos por mas!


Sondas artesanales miden con eficacia contaminación del agua

Desde nuestro grupo de investigación en NANOESTRUCTURAS Y FÍSICA APLICADA (#NANOUPAR) estamos interesados en hacer un ejercicio de economía circular, en el que, utilicemos materiales reciclados, botellas plásticas de alimentación (PET) básicamente, las cuales se pueden utilizar y luego triturar, para usarse de nuevo como material imprimible; la idea a mediano plazo es impulsar la creación de un Fablab en la región, en donde las propias comunidades hagan un ejercicio de reciclaje, y usen el plástico triturado para imprimir las cajas de las sondas.

Asimismo, el grupo de NANOUPAR de la Universidad Nacional de Colombia sede de La Paz seguimos investigando para proveer de una alimentación energética robusta y permanente a estas sondas portables, por medio de nanogeneradores termoeléctricos y piezoeléctricos  – dispositivos pequeños que convierten la diferencia del calor y del movimiento en energía eléctrica-,respectivamente. De esta forma dar autonomía a las sondas y poder darle usos en el ecosistema del internet de las cosas (IoTs) #4RI.

Así junto a la profesora Alba Avila de la Facultad de Ingeniería – Universidad de los Andes en el marco del proyecto: Community Technology Literacy IEEE Electron Devices Society continuar fortaleciendo los ejercicios de ciudadanos y ciudadanas científicos los cuales puedan participar del monitoreo de la calidad del agua y sus múltiples usos.


Más allá de los rankings:

¿hay investigación en inteligencia artificial para el desarrollo sostenible?

La producción de rankings internacionales de investigación, innovación y tecnología permite tener una visión general sobre las capacidades y la preparación de un país para producir y utilizar conocimiento científico. Tal es el caso del Global Innovation Index a nivel de sistemas de innovación nacionales y, en el caso de la inteligencia artificial (ia), el ranking realizado por Oxford Insights (2021), que ofrece datos sobre el uso de tecnologías de la información en el gobierno, iniciativas empresariales de ia y disposición de datos públicos.

Chavarro, Diego, Jaime Andrés Pérez Taborda, and Alba Ávila. Más allá de los rankings:¿ hay investigación en inteligencia artificial para el desarrollo sostenible?. Editorial Universidad del Rosario, 2022. (Artículo corto)

Our last paper:

Intense laser field effect on the D2+ molecular complex strongly confined in a semiconductor quantum ring: Electronic and optical properties

The present theoretical study is concerned with the behavior of a D2+ molecular complex strongly confined in a semiconductor quantum ring under external probes: intense laser-field radiation and orthogonal electric and magnetic fields. The theoretical calculations were made using the finite element method within the effective mass approximation. The effects of the external probes, donor-donor separation, and quantum ring geometrical parameters on the D2+ total energy, D2+ binding energy, and D2+ optical response are studied. We show that the laser-field radiation has a great influence on the two fragmentation processes of D2+ and on their essential features: equilibrium length and dissociation energy. The D2+ optical response defined through the adsorption coefficient is studied. Laser field radiation may cause red or blue shifts in the adsorption coefficient peak depending on the quantum ring size and donor-donor positions, while the magnetic field can induce an optical transparency effect.