Electrochemical synthesis and optical readout of striped metal rods with submicron features

High capacity tagging using nanostructured diffraction barcodes

“…Methods using magnetic tagging are also being investigated [6]. In particular, multicolor optical coding has been achieved by embedding quantum dots of zinc sulfide-capped cadmium selenide nanocrystals into beads [7][8][9][10] while patterns can also be written in fluorescently dyed beads by spatially selective photo-bleaching to create spatially selective fluorescent tags [11]. Here we describe a new method for encoding small beads which allows for non-contact reading.…”

Simultaneous Determination of α-Fetoprotein and Free β-Human Chorionic Gonadotropin by Element-Tagged Immunoassay with Detection by Inductively Coupled Plasma Mass Spectrometry

“…Color-coded microspheres overcome many of the shortcomings of quantum dots because several hundred spectrally different types of beads can be prepared (12 ). Unfortunately, this labeling system is limited by the number of spectrally distinguished fluorophores, and its use for analyte quantification has encountered difficulties (13 ). Barcode labels circumvent the problems of fluorophores and quantum dots (14 -16 ).…”

Microfabricated micropallets for enhancement of biomolecular techniques

“…Numerous encoding schemes and transportation techniques have been researched with interest and demand for multifunctional coding having long been identified in the literature (e.g., Braeckmans et al 2002Braeckmans et al , 2003aFinkel et al 2004;Verpoorte 2003). Many techniques and strategies exist for encoding and labeling, including beads (e.g., Fulton et al 1997;Keij and Steinkemp 1998;Kettman et al 1998;Braeckmans et al 2003a, b), quantum dots (e.g., Chan et al 2002;Gao et al 2002;Jiang et al 2005;So et al 2006) quantum dot embedded beads (e.g., Han et al 2001;Wang et al 2003), Cornell dots (e.g., Ow et al 2005), metal nanowires and nanorods (e.g., Keating and Natan 2003;Nicewarner-Peña et al 2001;Reiss et al 2002;Penn et al 2003;Walton et al 2002), glass plates (e.g., Ravkin et al 2004) and polymericbased particles (e.g., Evans et al 2003;Zhi et al 2003Zhi et al , 2005Pregibon et al 2007).…”