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DNA Adsorption, Desorption, and Fluorescence Quenching by Graphene Oxide and Related Analytical Application
(University of Waterloo, 2011-09-20)
Graphene is a single layer of graphite with many unique mechanical, electrical, and optical properties. In addition, graphene is also known to adsorb wide range of biomolecules including single-stranded DNA. On the other ...
In Vitro Selection of New DNAzymes as Metal Biosensors
(University of Waterloo, 2015-06-26)
In vitro selection of metal-specific DNAzymes has been shown to be a powerful method to obtain biosensors for metal ion detection. With 14 independent in vitro selection experiments using each of the trivalent lanthanide ...
In Vitro Selection of a New Lanthanide-Dependent DNAzyme for Ratiometric Sensing Lanthanides
(American Chemical Society, 2014-10-07)
Developing biosensors for lanthanides is an important but challenging analytical task. To address this problem, in vitro selection of RNA-cleaving DNAzymes was carried out using a library containing a region of 35 random ...
The group trend of lanthanides binding to DNA and DNAzymes with a complex but symmetric pattern
(Royal Society of Chemistry, 2014-07-18)
Using sensitized Tb3+ luminescence spectroscopy as a tool, binding of 14 lanthanides to a lanthanide-dependent DNAzyme is studied, where the binding affinity is symmetric across the series and the tightest binding occurs ...
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 ...
DNA-Length-Dependent Fluorescence Signaling on Graphene Oxide Surface
(Wiley, 2012-02-10)
Fluorescence energy transfer to graphene oxide is studied using covalently linked DNA probes ranging from 4 to 70 base pairs. The characteristic distance and mechanism of energy transfer are reported.
A DNAzyme requiring two different metal ions at two distinct sites
(Oxford University Press, 2015-12-10)
Most previously reported RNA-cleaving DNAzymes require only a single divalent metal ion for catalysis. We recently reported a general trivalent lanthanide-dependent DNAzyme named Ce13d. This work shows that Ce13d requires ...
Comparison of Graphene Oxide and Reduced Graphene Oxide for DNA Adsorption and Sensing
(American Chemical Society, 2016-10-18)
Fluorescently labeled DNA adsorbed on graphene oxide (GO) is a well-established sensing platform for detecting a diverse range of analytes. GO is a loosely defined material and its oxygen content may vary depending on the ...
An Ultrasensitive Light-up Cu2+ Biosensor Using a New DNAzyme Cleaving a Phosphorothioate-Modified Substrate
(American Chemical Society, 2017-01-15)
Cu2+ is a very important metal ion in biology, environmental science, and industry. Developing biosensors for Cu2+ is a key topic in analytical chemistry. DNAzyme-based sensors are highly attractive:, for their excellent ...
G-Quadruplex DNA for Fluorescent and Colorimetric Detection of Thallium(I)
(American Chemical Society, 2016-02-26)
Thallium is a highly toxic heavy metal, but its 495 nm FRET sensing is underexplored compared to its neighboring elements Blue in the periodic table: lead and mercury. Thallium has two " oxidation states. A DNAzyme-based ...