Search Results - "Ribeiro, David"

Visual detection using quantum dots sensing platforms by Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M.

“…[Display omitted] •QDs sensing platforms used to implement visual detection approaches are reviewed.•Distinct strategies for sensors assembly with enhanced…”
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Label-free quantum dot conjugates for human protein IL-2 based on molecularly imprinted polymers by Piloto, Ana Margarida L., Ribeiro, David S.M., Rodrigues, S. Sofia M., Santos, João L.M., Ferreira Sales, Maria Goreti

“…•Quantum dots modified with molecularly-imprinted polymer for protein detection.•The first molecularly-imprinted polymer for interleukin-2 reported so…”
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Application of quantum dots as analytical tools in automated chemical analysis: A review by Frigerio, Christian, Ribeiro, David S.M., Rodrigues, S. Sofia M., Abreu, Vera L.R.G., Barbosa, João A.C., Prior, João A.V., Marques, Karine L., Santos, João L.M.

“…[Display omitted] ► Review on quantum dots application in automated chemical analysis. ► Automation by using flow-based techniques. ► Quantum dots in liquid…”
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Dual-emission ratiometric probe combining carbon dots and CdTe quantum dots for fluorometric and visual determination of H2O2 by Castro, Rafael C., Soares, José X., Ribeiro, David S.M., Santos, João L.M.

“…[Display omitted] •Dual emission probe combining blue-emitting CDs and orange-emitting CdTe QDs.•H2O2 quenches the PL emission of QDs while the PL of CDs…”
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Comparison of near infrared spectroscopy and Raman spectroscopy for the identification and quantification through MCR-ALS and PLS of peanut oil adulterants by Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M., Páscoa, Ricardo N.M.J.

“…Peanut oil is considered one of the best frying oils, and, consequently there is an increasing worldwide demand. This has led to adulteration practices with…”
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Cellulose-based hydrogel on quantum dots with molecularly imprinted polymers for the detection of CA19-9 protein cancer biomarker by Piloto, Ana Margarida L., Ribeiro, David S. M., Rodrigues, S. Sofia M., Santos, João L. M., Sampaio, Paula, Sales, Maria Goreti Ferreira

“…Molecularly imprinted polymers MIPs were successfully assembled around quantum dots (QDs), for the detection of the protein biomarker CA19-9 associated to…”
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Multiplexed detection using quantum dots as photoluminescent sensing elements or optical labels by Castro, Rafael C., Saraiva, M. Lúcia M.F.S., Santos, João L.M., Ribeiro, David S.M.

“…[Display omitted] •Multiplexed detection approaches using PL nanocrystalline materials are surveyed.•Strengths and weaknesses of QDs as sensing elements or…”
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Detection of melamine and sucrose as adulterants in milk powder using near-infrared spectroscopy with DD-SIMCA as one-class classifier and MCR-ALS as a means to provide pure profiles of milk and of both adulterants with forensic evidence: A short communication by Mazivila, Sarmento J., Páscoa, Ricardo N.M.J., Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M.

“…The present short communication reports a promising analytical method for authentication of milk based on first-order near-infrared (NIR) spectroscopic data…”
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Rationally designed synthesis of bright AgInS2/ZnS quantum dots with emission control by Soares, José X., Wegner, K. David, Ribeiro, David S. M., Melo, Armindo, Häusler, Ines, Santos, João L. M., Resch-Genger, Ute

“…In the blossoming field of Cd-free semiconductor quantum dots (QDs), ternary I-III-VI QDs have received increasing attention due to the ease of the…”
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Authentication/discrimination, identification and quantification of cinnamon adulterants using NIR spectroscopy and different chemometric tools: A tutorial to deal with counterfeit samples by Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M., Páscoa, Ricardo N.M.J.

“…Cinnamon is one of the most consumed spices worldwide and its adulteration can pose several risks to human health. This work proposes a method for the…”
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Photoluminescent and visual determination of ibandronic acid using a carbon dots/AgInS2 quantum dots ratiometric sensing platform by Castro, Rafael C., Páscoa, Ricardo N.M.J., Saraiva, M. Lúcia M.F.S., Santos, João L.M., Ribeiro, David S.M.

“…[Display omitted] •CDs and ternary AIS QDs were blended in a ratiometric sensing platform for IBAN.•CDs exhibited chemical inertness to IBAN whilst the TMA-AIS…”
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Plastic antibodies tailored on quantum dots for an optical detection of myoglobin down to the femtomolar range by Piloto, Ana Margarida, Ribeiro, David S. M., Rodrigues, S. Sofia M., Santos, Catarina, Santos, João L. M., Sales, M. Goreti F.

“…A highly sensitive fluorescence detection probe was developed by tailoring plastic antibodies on the external surface of aqueous soluble quantum dots (QDs)…”
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Neutrophil elastase as a biomarker for bacterial infection in COPD by Thulborn, Samantha J, Mistry, Vijay, Brightling, Christopher E, Moffitt, Kelly L, Ribeiro, David, Bafadhel, Mona

“…Chronic obstructive pulmonary disease (COPD) is predominantly associated with neutrophilic inflammation. Active neutrophil elastase (NE) is a serine…”
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Chemometric-assisted kinetic determination of oxytetracycline using AgInS2 quantum dots as PL sensing platforms by Castro, Rafael C., Páscoa, Ricardo N.M.J., Saraiva, M.Lúcia M.F.S., Santos, João L.M., Ribeiro, David S.M.

“…In this work a kinetic fluorometric methodology relying on the time-based monitoring of the photoluminescence quenching of AgInS2 ternary quantum dots induced…”
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Dual-emission CdTe/AgInS2 photoluminescence probe coupled to neural network data processing for the simultaneous determination of folic acid and iron (II) by Castro, Rafael C., Ribeiro, David S.M., Páscoa, Ricardo N.M.J., Soares, José X., Mazivila, Sarmento J., Santos, João L.M.

“…This work focused on the combination of CdTe and AgInS2 quantum dots in a dual-emission nanoprobe for the simultaneous determination of folic acid and Fe(II)…”
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Synthesis of distinctly thiol-capped CdTe quantum dots under microwave heating: multivariate optimization and characterization by Ribeiro, David S. M., de Souza, Gustavo C. S., Melo, Armindo, Soares, José X., Rodrigues, S. Sofia M., Araújo, Alberto N., Montenegro, Maria Conceição B. S. M., Santos, João L. M.

“…The present work reports a straightforward one-step synthetic route assisted by microwave irradiation for the aqueous preparation of highly luminescence CdTe…”
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Chemometric-assisted surface-enhanced Raman spectroscopy for metformin determination using gold nanoparticles as substrate by Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M., Nunes, Cláudia, Reis, Salette, N.M.J. Páscoa, Ricardo

“…[Display omitted] •SERS with chemometric analysis was explored for metformin determination.•Citrate-AuNPs were used as substrate to perform the SERS scattering…”
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Chemometric models for data processing in quantum dots-based photoluminescence methodologies by Castro, Rafael C., Páscoa, Ricardo N.M.J., Saraiva, M. Lúcia M.F.S., Santos, João L.M., Ribeiro, David S.M.

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The use of in-situ Raman spectroscopy to monitor at real time the quality of different types of edible oils under frying conditions by Castro, Rafael C., Ribeiro, David S.M., Santos, João L.M., Páscoa, Ricardo N.M.J.

“…When edible oils are exposed to high temperatures, this leads to several chemical changes. Therefore, it is important to have an analytical method (rapid,…”
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Application of nanocrystalline CdTe quantum dots in chemical analysis: Implementation of chemo-sensing schemes based on analyte-triggered photoluminescence modulation by Rodrigues, S. Sofia M., Ribeiro, David S.M., Soares, José X., Passos, Marieta L.C., Saraiva, M. Lúcia M.F.S., Santos, João L.M.

“…[Display omitted] •The use of CdTe QDs in photoluminescence-based chemosensing strategies is reviewed.•The mechanisms of the interaction between targeted…”
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