Validity of a single antibody-based lateral flow immunoassay depending on graphene oxide for highly sensitive determination of E. coli O157:H7 in minced beef and river water

Abdel-Rahim H. A. Hassan, José Francisco Bergua, Eden Morales-Narváez, Arben Merkoçi. Food Chemistry
Considering the health risks of E. coli O157:H7 presence in food and water, an affordable and highly sensitive detection method is crucial. Herein, we report the first use of a single antibody-based fluorescent lateral flow immunoassay (FLFIA) depending on non-radiative energy transfer between graphene oxide and quantum dots for...

Low-Cost Strategy for the Development of a Rapid Electrochemical Assay for Bacteria Detection Based on AuAg Nanoshells

Lorenzo Russo, Juan Leva Bueno, Jose Francisco Bergua, Monica Constantini, Marco Giannetto, Víctor Puntes, Alfredo de la Escosura Muñiz, Arben Merkoçi. ACS Omega
A low-cost strategy for the simple and rapid detection of bacterial cells in biological matrixes is presented herein. Escherichia coli and Salmonella typhimurium were chosen as model bacteria for the development of an electrochemical assay based on hollow AuAg nanoshells (NSs). By taking advantage of their electrocatalytic properties...

Nanotecnología en los Biosensores de Papel

Daniel Quesada-González, Arben Merkoçi. Sociedad Española de Química Analítica, nº63
Click on the picture, and then, link to the journal: here

Iridium oxide (IV) nanoparticle-based electrocatalytic detection of PBDE

Damiel Quesada-González, Alessandra Baiocco, Andrea A. Martos, Alfredo de la Escosura-Muñiz, Arben Merkoçi. Biosensors and Bioelectronics
Polybrominated diphenyl ethers (PBDEs) are a type of flame retardants which are currently banned in EU and USA due their hazardousness for humans and mammals. However, these compounds were highly used during more than 30 years and still persist in the environment since they are resistant to degradation. Herein we present a biosensor for...

Electrochemical detection of plant virus using gold nanoparticle-modified electrodes

Mohga Khater, Alfredo de la Escosura-Muñiz, Daniel Quesada-González, Arben Merkoçi. Analytica Chimica Acta
Tristeza is one of the destructive diseases of citrus causing by citrus tristeza virus (CTV). Historically, CTV has been associated with serious outbreaks of quick decline of citrus, therefore CTV monitoring is important aspect for avoiding such re-emerging epidemics, which would threat citrus production through the world. In...

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
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
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
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
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
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,...