This paper’s emphasis is on the development of a fluorescent chemosensor for Fe3+ ions in an aqueous solution, using hydrophilic carbon dots (O-CDs). A simple, cost-effective, and environmentally friendly one-step hydrothermal synthesis method was used to synthesize O-CDs from Oxalis corniculata (Family; Oxalidaceae). The graphitic structure size distribution verified by X-ray diffraction, Rama...

nanotechnology is the engineering of functional systems at the molecular scale which may exert a revolutionary impact on cancer diagnosis and therapy. nanotechnology is being applied to cancer in two broad areas: i) the development of nanovectors such as nanoparticles which can be loaded with drugs or imaging agents and then targeted to tumours, and ii) high-throughput nanosensor devices for de...

Nanosensor Device for Breath Acetone Detection L. Wang1, K. Kalyanasundaram2, M. Stanacevic3, and P. Gouma4 ∗ 1Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC V6T1Z4, Canada 2Sensitron Semiconductor, Deer Park, NY 11729, USA 3Department of Electrical and Computer Engineering, SUNY Stony Brook, Stony Brook, NY 11794, USA 4Center for Nanomateri...

In the past years there is an increasing interest to incorporate in any electronic device a motion sensor to provide interaction: measuring our reactions, position or motion. Therefore, the motion sensors should be low-cost but more precise. A nanosensor based on a motion amplifier mechanism is presented. The design can amplify extremely small displacements (nanometers) up to 200 times. Partner...

We have developed a quantum dot-based microRNA nanosensor for point mutation assays using primer generation-mediated rolling circle amplification. The proposed method exhibits high sensitivity with a detection limit of as low as 50.9 aM and a large dynamic range of 7 orders of magnitude from 0.1 fM to 1 nM. Importantly, this method can be further applied to analyze the point mutation of mir-196...

We have developed a surface-enhanced Raman scattering (SERS) nanosensor firstly for Ag ions and Ag nanoparticles detection based on 2-mercaptoisonicotinic acid (2MNA)-functionalized Au nanoparticles. Ag(+) can coordinate with 2MNA resutling in a variation of its SERS spectrum, which is used as a criterion to determine Ag(+) in a solution. This sensor exhibits a detection limit no more than 25 n...

Folic acid, which provides the transfer of single carbon atoms in synthesis reactions and metabolic cycles metabolism, is very important for metabolism. acid also plays an role nucleotide methylation reactions. There are many disorders caused by defective folic metabolism lack acid. Today, innovative, cost-effective methods needed to develop determination methods. The main objective this study ...

Nanosphere lithography (NSL) derived triangular Ag nanoparticles were used to create an extremely sensitive and specific optical biological and chemical nanosensor. Using simple UV-vis spectroscopy, biotinylated surface-confined Ag nanoparticles were used to detect streptavidin down to one picomolar concentrations. The system was tested for nonspecific binding interactions with bovine serum alb...