Uranium (VI) detection in groundwater using a gold nanoparticle/paper-based lateral flow device

Daniel Quesada-González, Grace A. Jairo, Robert C. Blake II, Diane A. Blake, A. Merkoçi. Scientific Reports, 2018, Vol 8, Article number: 16157
The contamination in groundwater due to the presence of uranium is nowadays a subject of concern due to the severe health problems associated with renal failure, genotoxicity and cancer. The standard methods to detect uranium require time-consuming processes and expensive non-portable equipment, so these measurements are rarely performed...

Microorganism-decorated Nanocellulose for Efficient Diuron Removal

Jie Liu, Eden Morales-Narváez, Teresa Vincent, Arben Merkoçi, Guohua Zhong. Chemical Engineering, 2018, Vol 354, pp 1083-1091
The environmental impacts of diuron have generated growing interest in remediation methods to prevent the potential threat of diuron to ecosystem integrity and human beings. Here, a simple and effective nanocellulose-based biocomposite coupled with Arthrobacter globiformis D47 as a herbicide degrader is presented for the rapid...

Time- and Size-Resolved Plasmonic Evolution with nm Resolution of Galvanic Replacement Reaction in AuAg Nanoshells Synthesis

Lorenzo Russo, Florind Merkoçi, Javier Patarroyo, Jordi Piella, Arben Merkoçi, Neus G. Bastús, Victor Puntes. Chemistry of Materials, 2018, Vol 30 (15), pp 5098-5107
The rational design of advanced nanomaterials with enhanced optical properties can be reached only with the profound thermodynamic and kinetic understanding of their synthetic processes. In this work, the synthesis of monodisperse AuAg nanoshells with thin shells and large voids is achieved through the development of a highly reproducible...

Screen-Printed Electroluminescent Lamp Modified with Graphene Oxide as a Sensing Device

Abdulhadee Yakoh, Ruslan Álvarez-Diduk, Orawon Chailapakul, Arben Merkoçi. ACS Applied Materials & Interfaces, 2018, Vol 10 (24), pp 20775-20782
A screen-printed electroluminescent display with different sensing capabilities is presented. The sensing principle is based on the direct relationship between the light intensity of the lamp and the conductivity of the external layers. The proposed device is able to detect the ionic concentration of any conductive species. Using...

Nanomaterial-based devices for point-of-care diagnostic applications

Daniel Quesada-González, Arben Merkoçi. Chemical Society Reviews, 2018, Vol 47, pp 4697-4709
In this review, we have discussed the capabilities of nanomaterials for point-of-care (PoC) diagnostics and explained how these materials can help to strengthen, miniaturize and improve the quality of diagnostic devices. Since the optical, electrochemical and other physical properties of nanomaterials are dictated by their composition,...

2D Materials‐Based Platforms for Electroanalysis Applications

Georgina Alarcon-Angeles, Manuel Palomar-Pardavé, Arben Merkoçi. Electroanalysis, 2018, Vol 30, pp 1271
A new class of nanomaterials called “2D materials” (2DMs) is attracting recently the electrochemical sensing field due to the unique physicochemical properties associated to their chemical structure, formed by ultra‐thin layers. In this review, we summarize the recent advances in the electroanalysis area using 2DMs giving first...

Graphene Oxide-Poly(dimethylsiloxane)-Based Lab-on-a-Chip Platform for Heavy-Metals Preconcentration and Electrochemical Detection

Andrzej Chalupniak, Arben Merkoçi. ACS Applied Materials & Interfaces, 2017, Vol 95 (1), pp 44766-44775
Herein, we present the application of a novel graphene oxide-poly(dimethylsiloxane) (GO-PDMS) composite in reversible adsorption/desorption, including detection of heavy metals. GO-PDMS was fabricated by simple blending of GO with silicon monomer in the presence of tetrahydrofuran, followed by polymerization initiated upon the addition...

In situ monitoring of PTHLH secretion in neuroblastoma cells cultured onto nanoporous membranes

Alfredo de la Escosura-Muñiz, Marisol Espinoza-Casteñeda, Alejandro Chamorro-Garcia, Carlos J. Rodríguez-Hernández, Carmen de Torres, Arben Merkoçi. Biosensors & Bioelectronics, 2018, Vol 107, pp 62-68
In this work, we propose for the first time the use of anodic aluminum oxide (AAO) nanoporous membranes for in situ monitoring of parathyroid hormone-like hormone (PTHLH) secretion in cultured human cells. The biosensing system is based on the nanochannels blockage upon immunocomplex formation, which is electrically monitored through...

Architecting Graphene Oxide Rolled-Up Micromotors: A Simple Paper-Based Manufacturing Technology

Luis Baptista Pires, Jahir Orozco, Pablo Guardia, Arben Merkoçi. Small, 2018, Vol 14, pp 1702746
A graphene oxide rolled-up tube production process is reported using wax-printed membranes for the fabrication of on-demand engineered micromotors at different levels of oxidation, thickness, and lateral dimensions. The resultant graphene oxide rolled-up tubes can show magnetic and catalytic movement within the addition of magnetic...

Nanomaterials connected to antibodies and molecularly imprinted polymers as bio/receptors for bio/sensor applications

Alejandro Zamora, Eden Morales-Narváez, Carmen C. Mayorga-Martínez, Arben Merkoçi. Applied Materials Today, , 2017, Vol 9, pp 387-401,
Nowadays, nanomaterials are considered a pivotal tool for different fields such as textiles, energy, environment, electronics, photonics, food, agriculture, biomedicine and health care. This is due to their advantageous properties coming from their high surface area, among other physicochemical properties, compared to their respective...