Fluorescent Si nanoparticle-based electrode for sensing biomedical substances

Optical and magneto-optical diagnostics of polymer/nanoparticles colloidal solutions and composites

“…The growth of nanocrystals depends on a number of parameters, such as the surface energy of the nanocrystal, the concentration of free species in a solution, and the nanocrystal size, and thus the nanocrystal growth can be controlled by considering these parameters. A theoretical consideration of the probability of chemical reactions in the multicomponent system Cd 2+ -Mn 2+ -S 2--H 2 O in case of the synthesis of nanoparticles has shown that the optimal ranges of a change of the molar concentration of precursors and the pH value of the medium are within the limits of (10 -4 -10 -2 ) mol/l and (3)(4)(5), respectively.…”

“…In recent years semiconductor nanocrystals, nanoparticles, or quantum dots have attracted much attention because their optical and electronic properties can be controlled by their size [1][2][3][4][5][6][7]. Indeed, the peaks in absorption and photoluminescence spectra of such nanostructures shifted from ultraviolet to infrared just by changing their size.…”

“…Indeed, the peaks in absorption and photoluminescence spectra of such nanostructures shifted from ultraviolet to infrared just by changing their size. As a result, these peculiarities of semiconductor nanocrystals open a wide range of potential applications such as biological sensors [1][2][3], solar cells [4], and light-emitting devices [5][6][7]. However, the synthesis of nanoparticles in aqueous phase with tuned nanocrystalline size and narrow size distribution still remains challenge task.…”

Biomedical and Sensor Applications of Silicon Nanoparticles

“…Although several authors suggest possible applications as gas or biomolecule sensors, so far the only report on sensing applications of disperse Si NPs is the amperometric detection of glucose using an electrode formed by a layer of Si 29 nanoclusters deposited on a heavily doped Si substrate [80], thus producing an allsilicon device. The sensor showed enhanced sensitivity with respect to the devices based on the glucose oxidase (GO) enzyme, together with improved selectivity and stability.…”

Complex of heavy magnetic ions and luminescent silicon nanoparticles

“…Additionally, bound complex formation of nanoparticles with ions provide some change in energy levels that can afford interesting non-optical applications such as memory devices 4 or electrochemical sensors. [5][6][7] For instance, interactions of silicon nanoparticles with ions, i.e., complex formation, can be exploited for detection of biological molecules such as glucose, [5][6][7] or electric current generation such as biofuel cells via charge transfer mechanisms, 8,9 or patterned deposition, 10 or addressing unexplained spectral phenomena in the galaxies pertaining to interplanetary and interstellar media. [11][12][13][14][15][16] The interaction of immobilized Si nanoparticles with Er ions embedded in a silicon oxide substrate in a non-complex configuration with nanoparticle-ion interspacing of several angstroms (10 Å for example) was also found to be useful in generation of infrared radiation for fiber communication applications.…”