Search Results - "Martins, José C."
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A Solution NMR Toolbox for Characterizing the Surface Chemistry of Colloidal Nanocrystals
Published in Chemistry of materials (23-04-2013)“…The possibilities offered by 1H solution NMR for the study of colloidal nanocrystal ligands are reviewed. Using CdSe and PbSe nanocrystals with tightly bound…”
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Colloidal CdSe Nanoplatelets, A Model for Surface Chemistry/Optoelectronic Property Relations in Semiconductor Nanocrystals
Published in Journal of the American Chemical Society (17-10-2018)“…While the surface termination of quasi-spherical metal chalcogenide nanocrystals or quantum dots has been widely investigated, it remains unclear whether the…”
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3
Cyclic Lipodepsipeptides From Pseudomonas spp. - Biological Swiss-Army Knives
Published in Frontiers in microbiology (14-08-2018)“…Cyclic lipodepsipeptides produced by spp. (Ps-CLPs) are biosurfactants that constitute a diverse class of versatile bioactive natural compounds with promising…”
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4
Size-Tunable, Bright, and Stable PbS Quantum Dots: A Surface Chemistry Study
Published in ACS nano (22-03-2011)“…PbS Qdots are synthesized using PbCl2 and elemental sulfur as precursors. The available size range is significantly expanded using tri-n-octylphosphine (TOP),…”
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Ligand Displacement Exposes Binding Site Heterogeneity on CdSe Nanocrystal Surfaces
Published in Chemistry of materials (13-02-2018)“…Nanocrystal–ligand interactions and ligand exchange processes are usually described by a uniform distribution of equal binding sites. Here, we analyze this…”
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Surface Chemistry of Colloidal PbSe Nanocrystals
Published in Journal of the American Chemical Society (12-11-2008)“…Solution nuclear magnetic resonance spectroscopy (NMR) is used to identify and quantify the organic capping of colloidal PbSe nanocrystals (Q-PbSe). We find…”
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Do Aptamers Always Bind? The Need for a Multifaceted Analytical Approach When Demonstrating Binding Affinity between Aptamer and Low Molecular Weight Compounds
Published in Journal of the American Chemical Society (18-11-2020)“…In this manuscript, we compare different analytical methodologies to validate or disprove the binding capabilities of aptamer sequences. This was prompted by…”
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Short-Chain Alcohols Strip X‑Type Ligands and Quench the Luminescence of PbSe and CdSe Quantum Dots, Acetonitrile Does Not
Published in Journal of the American Chemical Society (26-12-2012)“…The effect of short-chain alcohols and acetonitrile on the ligand shell composition and the photoluminescence quantum yield of purified PbSe and CdSe quantum…”
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Utilizing Self-Exchange To Address the Binding of Carboxylic Acid Ligands to CdSe Quantum Dots
Published in Journal of the American Chemical Society (28-07-2010)“…We use solution NMR techniques to analyze the organic/inorganic interface of CdSe quantum dots (Q-CdSe) synthesized using oleic acid as a surfactant. It is…”
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10
Colloidal metal oxide nanocrystal catalysis by sustained chemically driven ligand displacement
Published in Nature materials (01-05-2016)“…Here the authors show that nanocrystals of hafnium oxide can be applied as stable catalytic materials using a dynamic ligand-exchange reaction mechanism…”
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Size-Dependent Optical Properties of Colloidal PbS Quantum Dots
Published in ACS nano (27-10-2009)“…We quantitatively investigate the size-dependent optical properties of colloidal PbS nanocrystals or quantum dots (Qdots), by combining the Qdot absorbance…”
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12
Combinatorial biosynthesis of sapogenins and saponins in Saccharomyces cerevisiae using a C-16α hydroxylase from Bupleurum falcatum
Published in Proceedings of the National Academy of Sciences - PNAS (28-01-2014)“…The saikosaponins comprise oleanane- and ursane-type triterpene saponins that are abundantly present in the roots of the genus Bupleurum widely used in Asian…”
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13
Unravelling the Surface Chemistry of Metal Oxide Nanocrystals, the Role of Acids and Bases
Published in Journal of the American Chemical Society (09-07-2014)“…We synthesized HfO2 nanocrystals from HfCl4 using a surfactant-free solvothermal process in benzyl alcohol and found that the resulting nanocrystals could be…”
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14
Gelatin- and starch-based hydrogels. Part A: Hydrogel development, characterization and coating
Published in Carbohydrate polymers (05-11-2016)“…•Hydrogel films were developed consisting of methacrylamide-modified gelatin and starch-pentenoate building blocks.•The mechanical properties of the hydrogels…”
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15
Multifunctionalized Sequence-Defined Oligomers from a Single Building Block
Published in Angewandte Chemie International Edition (09-12-2013)“…Another link in the chain: A thiolactone‐based approach for the preparation of multifunctionalized sequence‐defined oligomeric structures on solid support was…”
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16
Complex electrostatic effects on the selectivity of membrane-permeabilizing cyclic lipopeptides
Published in Biophysical journal (21-03-2023)“…Cyclic lipopeptides (CLiPs) have many biological functions, including the selective permeabilization of target membranes, and technical and medical…”
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Binding and Packing in Two-Component Colloidal Quantum Dot Ligand Shells: Linear versus Branched Carboxylates
Published in Journal of the American Chemical Society (08-03-2017)“…In this work, we present a combined experimental and theoretical analysis of two-component ligand shells passivating CdSe quantum dots. Using nuclear magnetic…”
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Controlling the Size of Hot Injection Made Nanocrystals by Manipulating the Diffusion Coefficient of the Solute
Published in Journal of the American Chemical Society (25-02-2015)“…We investigate the relation between the chain length of ligands used and the size of the nanocrystals formed in the hot injection synthesis. With two different…”
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Binding of Phosphonic Acids to CdSe Quantum Dots: A Solution NMR Study
Published in The journal of physical chemistry letters (03-02-2011)“…We use 1H and 31P solution nuclear magnetic resonance spectroscopy to analyze the binding of phosphonic acid ligands to wurtzite CdSe quantum dots (CdSe QDs)…”
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Highly Reactive Thiol‐Norbornene Photo‐Click Hydrogels: Toward Improved Processability
Published in Macromolecular rapid communications. (01-07-2018)“…In the present work, gelatin type B is modified with highly reactive norbornene functionalities (Gel‐NB) following a one‐pot synthesis approach to enable…”
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