Multiplexed DNA Detection Using Spectrally Encoded Porous SiO2 Photonic Crystal Particles
- 9 March 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 81 (7), 2618-2625
- https://doi.org/10.1021/ac802538x
Abstract
A particle-based multiplexed DNA assay based on encoded porous SiO2 photonic crystal disks is demonstrated. A “spectral barcode” is generated by electrochemical etch of a single-crystal silicon wafer using a programmed current−time waveform. A lithographic procedure is used to isolate cylindrical microparticles 25 μm in diameter and 10 μm thick, which are then oxidized, modified with a silane linker, and conjugated to various amino-functionalized oligonucleotide probes via cyanuric chloride. It is shown that the particles can be decoded based on their reflectivity spectra and that a multiple analyte assay can be performed in a single sample with a modified fluorescence microscope. The homogeneity of the reflectivity and fluorescence spectra, both within and across the microparticles, is also reported.Keywords
This publication has 22 references indexed in Scilit:
- Encoded Silica Colloidal Crystal Beads as Supports for Potential Multiplex ImmunoassayAnalytical Chemistry, 2008
- Microfabrication of freestanding porous silicon particles containing spectral barcodesPhysica Status Solidi (RRL) – Rapid Research Letters, 2006
- Highly parallel genomic assaysNature Reviews Genetics, 2006
- Autofluorescence removal, multiplexing, and automated analysis methods for in-vivo fluorescence imagingJournal of Biomedical Optics, 2005
- Porous Silicon Photonic Crystals as Encoded MicrocarriersAdvanced Materials, 2004
- Strategies for covalent attachment of DNA to beadsPeptide Science, 2004
- Semiconductor Nanocrystals as Fluorescent Biological LabelsScience, 1998
- Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic DetectionScience, 1998
- An active microelectronics device for multiplex DNA analysisIEEE Engineering in Medicine and Biology Magazine, 1996
- Light-Directed, Spatially Addressable Parallel Chemical SynthesisScience, 1991