Nicolas Rincon-Garcia

• Pontifical Xavierian University

The thermoelectric properties of molecular junctions consisting of a metal Pt electrode contacting [60]fullerene derivatives covalently bound to a graphene electrode have been studied by using a conducting-probe atomic force microscope (c-AFM). The [60]fullerene derivatives are covalently linked to the graphene via two meta-connected phenyl rings,...

Near-field radiative heat transfer (NFRHT) between planar metallic surfaces was computationally explored over five decades ago by Polder and van Hove [Phys. Rev. B 4, 3303 (1971)]. These studies predicted that, as the gap size (d) between the surfaces decreased, the radiative heat flux first increases by several orders of magnitude until d is ∼100...

For the purpose of creating single-molecule junctions, which can convert a temperature difference ΔT into a voltage ΔV via the Seebeck effect, it is of interest to screen molecules for their potential to deliver high values of the Seebeck coefficient S = -ΔV/ΔT. Here we demonstrate that insight into molecular-scale thermoelectricity can be obtained...

For the purpose of creating single-molecule junctions, which can convert a temperature difference DT into a voltage DV via the Seebeck effect, it is of interest to screen molecules for their potential to deliver high values of the Seebeck coefficient S = ÀDV/DT. Here we demonstrate that insight into molecular-scale thermoelectricity can be obtained...

Organic thermoelectric materials have potential for wearable heating, cooling, and energy generation devices at room temperature. For this to be technologically viable, high-conductance (G) and high-Seebeck-coefficient (S) materials are needed. For most semiconductors, the increase in S is accompanied by a decrease in G. Here, using a combined expe...

Interactions between electrodes and pendant groups in cross-conjugated systems destroy destructive quantum interference resulting in an increase of G and a decrease of S .

The ability to control the charge state of individual molecules wired in two-terminal single-molecule junctions is a key challenge in molecular electronics, particularly in relation to the development of molecular memory and other computational componentry. Here we demonstrate that single porphyrin molecular junctions can be reversibly charged and...

New retail trends show the increasing importance of providing cost efficient deliveries in cities, where congestion and compliance with driving hours regulations should be incorporated into routing software. This paper introduces a large neighbourhood search algorithm that substantially improves the benchmark solutions (in terms of the number of ve...

We report measurements on gold|single-molecule|gold junctions, using a modified scanning tunneling microscope-break junction (STM-BJ) technique, of the Seebeck coefficient and electrical conductance of a series of bridged biphenyl molecules, with meta connectivities to pyridyl anchor groups. These data are compared with a previously reported study...

Routing and scheduling software is part of the information and technology systems available to support the transport industry, and uses complex algorithms along with geographical representations of the road network to allow better planning of daily collection and delivery schedules. This paper reviews the evolution of routing and scheduling softwar...

This article paper presents a hybrid metaheuristic algorithm to solve the time-dependent vehicle routing problem with hard time windows. Time-dependent travel times are influenced by different congestion levels experienced throughout the day. Vehicle scheduling without consideration of congestion might lead to underestimation of travel times and co...

p>En Colombia, el comercio electrónico está aumentando considerablemente según cifras de la Cámara Colombiana de Comercio Electrónico, CCCE. En este mercado, las grandes superficies como Jumbo, La 14, Almacenes Éxito y Carulla, entre otras, participan por medio del servicio de entregas a domicilio (Home delivery ). Este servicio se compone de 3 eta...

The measurement of thermopower in molecular junctions offers complementary information to conductance measurements and is becoming essential for the understanding of transport processes at the nanoscale. In this review, we discuss the recent advances in the study of the thermoelectric properties of molecular junctions. After presenting the theoreti...

In this paper the expectations of public transport users of the Bus Rapid Transit System (BRT) and the Public Collective Transport (Bus) regarding a possible Metro system (Metro) implementation in Bogota (Colombia) are identified by means of a survey in order to provide a better understanding of the service quality longed for future users of the pr...

Routing and scheduling software is part of the Information and Technology systems available to support the transport industry, and uses complex algorithms along with geographical representations of the road network to allow better planning of daily collection and delivery schedules. This research reviews the evolution of routing and scheduling soft...

Using a modified scanning tunnelling microscope we measure simultaneously the thermopower and conductance of single-molecule junctions of fullerenes connected to gold electrodes. We find that in contrast with C 60 (1) the endohedral fullerene Sc 3 N@C 80 (2) forms jnctions in which the magnitude and sign of the thermopower depend strongly on the or...

Molecular junctions are a versatile test bed for investigating nanoscale thermoelectricity and contribute to the design of new cost-effective environmentally friendly organic thermoelectric materials. It was suggested that transport resonances associated with discrete molecular levels could play a key role in thermoelectric performance, but no dire...

La minería de procesos es una disciplina que tiene como objetivo descubrir, monitorear y mejorar procesos de negocio a través del análisis del registro de los eventos del proceso que se encuentran almacenados en los sistemas de información. En este artículo se presenta el desarrollo de la minería de procesos y se analizan tres casos de estudio de a...

We report conductance and thermopower measurements of metallic atomic-size contacts, namely gold and platinum, using a scanning tunneling microscope (STM) at room temperature. We find that few-atom gold contacts have an average negative thermopower, whereas platinum contacts present a positive thermopower, showing that for both metals, the sign of...

En el análisis y mejoramiento de procesos pueden emplearse diferentes aproximaciones donde Business Process Management y Seis Sigma se encuentran entre las principales metodologías empleadas por las organizaciones. Si bien estas metodologías tienen enfoques diferentes, no son excluyentes y en la literatura se recomienda su uso complementario, dado...

In the analysis and improvement of processes, different approaches can be used; Business Process Management and Six Sigma are found among the principle methodologies employed by organizations. Although these methodologies have different approaches, there are not mutually exclusive. In the literature, their complementary used is recommended, given t...

The vehicle routing problem (where, in the basic formulation, a set of Nv vehicles must be assigned to visit NL locations with the minimum total route length) is one of the most widely studied theoretical problems in logistics; over the years many variations have been proposed, including for example capacity constrained problems for heterogeneous v...