Luminescent Color Image Generation on Porous Silicon

Doan, Vincent V.; Sailor, Michael J.

doi:10.1126/science.256.5065.1791

Cited by 83 publications

(51 citation statements)

References 18 publications

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“…2,3 In the 1980's, several studies of the optical properties of PSi were published and photoluminescence ͑PL͒ in the deep red/near infrared was detected at cryogenic temperatures. 4 The roomtemperature luminescence, which has been observed from PSi usually formed in a concentrated HF based electrolyte by Canham 5 in 1990, has attracted considerable attention because of its potential use in the development of silicon-based optoelectronic devices, 6 such as electroluminescent displays 7 and photodetector. 8 The porous structure and a relatively large surface area have also made the silicon an ideal matrix for immobilization of a variety of biomolecules including enzymes, 9 DNA fragments, 10 and antibodies.…”

Section: Introductionmentioning

confidence: 99%

Vapor-phase silanization of oxidized porous silicon for stabilizing composition and photoluminescence

Zhu

et al. 2009

Journal of Applied Physics

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A vapor-phase deposition approach to the silanization modification of the oxidized porous silicon ͑PSi͒ surface using ͑CH 3 O͒ 3 Si͑CH 2 ͒ 3 NH 2 has been exploited. Standard clean ͑SC͒-1 ͑NH 3 H 2 O / H 2 O 2 / H 2 O, 1:1:5,v/ v͒ and SC-2 ͓HCl/ H 2 O 2 / H 2 O ͑1:1:6,v/ v͔͒ solutions are utilized for the first time to obtain oxidized PSi and have been proved to be a very efficient combination for creating Si-OH species on the PSi surface. After the modification, an amine group terminated surface was successfully created as demonstrated by the contact angle with water, the x-ray photoelectron spectroscopy, and the Fourier transform infrared ͑FTIR͒ spectra. The influences of the surface derivatives on the composition stability of the PSi layer and on its photoluminescence properties were investigated by means of FTIR spectra, photoluminescence spectra, and time-resolved photoluminescence measurements.

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Section: Introductionmentioning

confidence: 99%

Vapor-phase silanization of oxidized porous silicon for stabilizing composition and photoluminescence

Zhu

et al. 2009

Journal of Applied Physics

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“…Species with no catalytic properties in their bulk phase, such as Au, at the nanometric size reveal strong catalytic attitudes that critically depend on the cluster size and shape (Janssens et al, 2006). Similarly, materials such as silicon, with poor luminescence yield in the bulk phase, become interesting light emitters upon photo-or electro-stimulation when transformed into a spongy-like structure with suitably oriented nanometric pores (Doan and Sailor, 1992). We will see in the next Section how size and shape also concur to determine the biological activity of nanopharmaceuticals, which are the current entry point of nanotechnologies into Medicine.…”

Section: Defining Nanotechnologies: Why Small Is Differentmentioning

confidence: 98%

An Introduction to Nanotechnologies: What’s in it for Us?

Narducci

2007

Vet Res Commun

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Nanotechnologies are one of the two most prominent actors of the scientific revolution marking the beginning of the new Millennium. As for biotechnology, nanotechnologies are the outcome of an interdisciplinary, new approach to old technological issues ranging from device manufacturing to energy conversion, from sensing to signal amplification and transmission. The discovery of unexpected physical and chemical behavior of matter at the nanometer scale has paved the way to a number of exploitations (some current, most real but prospective). In this paper I will briefly review the nanotechnologies, showing most promise for Medicine and Veterinary Medicine. In this specific area, I will discuss current techniques and soon-to-come applications in nano-pharmaceuticals (i.e. pharmaceuticals based on the specific chemistry of nanoparticles), in vivo targeted nanodispensers, and nanoactuators. Some closing remarks will be made on how this will affect animal health control and healing in the near future.

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“…For instance, porous silicon is fabricated from p-type silicon using electrochemical etching process. 20 Similarly the anodized aluminum oxide (AAO) nanopores are fabricated from Al foil thin film (typically 1.0 mm thick, purity 99.998%) using two-step anodization process. The fabrication processes of both types of nanopores are basically not compatible with the batch-fabrication process offered by the standard microfabrication process.…”

Section: Introductionmentioning

confidence: 99%

A Transparent Nanostructured Optical Biosensor

He¹,

Li²,

Que³

2014

j biomed nanotechnol

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Herein we report a new transparent nanostructured Fabry-Perot interferometer (FPI) device. The unique features of the nanostructured optical device can be summarized as the following: (i) optically transparent nanostructured optical device; (ii) simple and inexpensive for fabrication; (iii) easy to be fabricated and scaled up as an arrayed format. These features overcome the existing barriers for the current nanopore-based interferometric optical biosensors by measuring the transmitted optical signals rather than the reflected optical signals, thereby facilitating the optical testing significantly for the arrayed biosensors and thus paving the way for their potential for high throughput biodetection applications. The optically transparent nanostructures (i.e., anodic aluminum oxide nanopores) inside the FPI devices are fabricated from 2.2 microm thick lithographically patterned Al thin film on an indium tin oxide (ITO) glass substrate using a two-step anodization process. Utilizing the binding between Protein A and porcine immunoglobulin G (IgG) as a model, the detection of the bioreaction between biomolecules has been demonstrated successfully. Experiments found that the lowest detection concentration of proteins is in the range of picomolar level using current devices, which can be easily tuned into the range of femtomolar level by optimizing the performance of devices.

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Luminescent Color Image Generation on Porous Silicon

Cited by 83 publications

References 18 publications

Vapor-phase silanization of oxidized porous silicon for stabilizing composition and photoluminescence

Vapor-phase silanization of oxidized porous silicon for stabilizing composition and photoluminescence

An Introduction to Nanotechnologies: What’s in it for Us?

A Transparent Nanostructured Optical Biosensor

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