Browsing Waterloo Institute for Nanotechnology by Title
Now showing items 115-134 of 193
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Label-Free Ag+ Detection by Enhancing DNA Sensitized Tb3+ Luminescence
(Multidisciplinary Digital Publishing Institute, 2016-08-26)In this work, the effect of Ag+ on DNA sensitized Tb3+ luminescence was studied initially using the Ag+-specific RNA-cleaving DNAzyme, Ag10c. While we expected to observe luminescence quenching by Ag+, a significant ... -
Light-Activated Metal-Coordinated Supramolecular Complexes with Charge-Directed Self-Assembly
(American Chemical Society, 2013-02-21)Metal-coordinated materials are attractive for many applications including catalysis, sensing, and controlled release. Adenine and its derivatives have been widely used to generate many coordination complexes, polymers, ... -
Liposome Supported Metal Oxide Nanoparticles: Interaction Mechanism, Light Controlled Content Release and Intracellular Delivery
(Wiley, 2014-05-26)Zwitterionic phosphotydylcholine liposomes stably adsorb a number of metal oxide nanoparticles via its phosphate group. This is different from physisorption and fusion with SiO2. The hybrid materials can be internalized ... -
Liposome/Graphene Oxide Interaction Studied by Isothermal Titration Calorimetry
(American Chemical Society, 2015-03-15)The interaction between graphene oxide (GO) and lipid bilayers is important for fundamental surface science and many applications. In this work, isothermal titration calorimetry (ITC), cryo-TEM, and fluorescence spectroscopy ... -
Magnetic Iron Oxide Nanoparticle Seeded Growth of Nucleotide Coordinated Polymers
(American Chemical Society, 2016-06-22)The introduction of functional molecules to the surface of magnetic iron oxide nanoparticles (NPs) is of critical importance. Most previously reported methods were focused on surface ligand attachment either by physisorption ... -
Magnetic nano-nets for capture of microbes in solution based on physical contact
(Elsevier, 2019-02-01)Self-assembly of Au nanoparticles with Fe ions is used to develop magnetic nano-nets similar to fishing nets for capture and removal of microbes in aqueous medium. The nano-nets have a high aspect ratio, span microns in ... -
Mechanisms of DNA Sensing on Graphene Oxide
(American Chemical Society, 2013-08-20)Adsorption of a fluorophore-labeled DNA probe by graphene oxide (GO) produces a sensor that gives fluorescence enhancement in the presence of its complementary DNA (cDNA). While many important analytical applications have ... -
Metal-Induced Specific and Nonspecific Oligonucleotide Folding Studied by FRET and Related Biophysical and Bioanalytical Implications
(Wiley, 2012-01-13)Metal induced nucleic acid folding has been extensively studied with ribozymes, DNAzymes, tRNA and riboswitches. These RNA/DNA molecules usually have a high content of double-stranded regions to support a rigid scaffold. ... -
Microparticle suspensions and bacteria laden droplets: Are they the same in terms of wetting signature?
(ACS, 2021-01-17)Adhesion behavior of microbial pathogens on commonly encountered surfaces is one of the most pertinent questions now. We present the characterization of bacteria laden droplets and quantify the adhesion forces on highly ... -
Molecular Beacon Lighting up on Graphene Oxide
(American Chemical Society, 2012-05-01)A molecular beacon (MB) is comprised of a fluorophore and a quencher linked by a DNA hairpin. MBs have been widely used for homogeneous DNA detection. In addition to molecular quenchers, many nanomaterials such as graphene ... -
Molecularly Imprinted Polymers with DNA Aptamer Fragments as Macromonomers
(American Chemical Society, 2016-03-16)Molecularly imprinted polymers (MIPs) are produced in the presence of a template molecule. After removing the template, the cavity can selectively rebind the template. MIPs are attractive functional materials with a low ... -
Multicopper Laccase Mimicking Nanozymes with Nucleotides as Ligands
(American Chemical Society, 2017-01-18)Using nanomaterials to achieve functional enzyme mimics (nanozymes) is attractive for both applied and fundamental research. Laccases are multicopper oxidases highly important for biotechnology and environmental remediation. ... -
Nanodiamond decorated liposomes as highly biocompatible delivery vehicles and a comparison with carbon nanotubes and graphene oxide
(Royal Society of Chemistry, 2013-12-21)Studying interactions between nano-carbons and lipid membranes is important for multiplexed drug delivery, device fabrication and for understanding toxicity. Herein, we report that nanodiamond (ND, sp3 carbon) forms a ... -
Nature-inspired robust hydrochromic film for dual anticounterfeiting
(Elsevier, 2021-06)Nature-inspired materials have been actively developed for anticounterfeiting applications. Among a variety of stimuli-responsive anticounterfeiting strategies, hydrochromic materials exhibit reversible color change in ... -
New approaches to characterize polymeric oil additives in solution based on pyrene excimer fluorescence
(Wiley, 2017-01-01)Maleated polyolefins (MaPOs) such as maleated ethylene propylene copolymers or polyisobutylene terminated at one end with a succininic anhydride can be used as polymeric dispersants in engine oils after reaction with ... -
A New Na+-Dependent RNA-Cleaving DNAzyme with over 1000-fold Rate Acceleration by Ethanol
(Wiley, 2016-01-15)Enzymes working in organic solvents are important for analytical chemistry, catalysis, and mechanistic studies. Although a few protein enzymes are highly active in organic solvents, little is known regarding nucleic ... -
Non-linear, non-monotonic effect of nano-scale roughness on particle deposition in absence of an energy barrier: Experiments and modeling
(Springer Nature, 2015-12-11)Deposition of colloidal- and nano-scale particles on surfaces is critical to numerous natural and engineered environmental, health, and industrial applications ranging from drinking water treatment to semi-conductor ... -
Nucleotide coordination with 14 lanthanides studied by isothermal titration calorimetry
(Elsevier, 2017-06-09)With their hydrolytic, optical and magnetic properties, lanthanide ions (Ln3+) are versatile probes for nucleic acids. In addition, nucleotide-coordinated Ln3+ ions form useful nanoparticles. However, the thermodynamic ... -
Numerical Study on Single Flowing Liquid and Supercritical CO2 Drop in Microchannel: Thin Film, Flow Fields, and Interfacial Profile
(MDPI, 2018-06-01)Taylor segments, as a common feature in two- or multi-phase microflows, are a strong flow pattern candidate for applications when enhanced heat or mass transfer is particularly considered. A thin film that separates these ... -
Oligonucleotide-functionalized hydrogels as stimuli responsive materials and biosensors
(Royal Society of Chemistry, 2011-08-07)Hydrogels are crosslinked hydrophilic polymers that undergo swelling in water. The gel volume is affected by many environmental parameters including temperature, pH, ionic strength, and solvent composition. Therefore, these ...