# IEEE Sensors Journal

## Filter Results

Displaying Results 1 - 25 of 66

Publication Year: 2008, Page(s):637 - 640
| PDF (56 KB)
• ### Editorial Nanosensors for Defense and Security

Publication Year: 2008, Page(s):641 - 646
| PDF (1631 KB) | HTML
• ### Electrically Active Magnetic Nanoparticles for Concentrating and Detecting Bacillus anthracis Spores in a Direct-Charge Transfer Biosensor

Publication Year: 2008, Page(s):647 - 654
Cited by:  Papers (17)
| | PDF (1776 KB) | HTML

Bacillus anthracis, the causative agent of anthrax, is considered as one of the most important pathogens in the list of bioterrorism threats. This paper describes the synthesis of electrically active magnetic (EAM) nanoparticles and their application in a direct-charge transfer biosensor for detecting B. anthracis Sterne endospores. These EAM nanoparticles were synthesized from aniline monomer mad... View full abstract»

• ### A Versatile Biomolecular Charge-Based Sensor Using Oxide-Gated Carbon Nanotube Transistor Arrays

Publication Year: 2008, Page(s):655 - 660
Cited by:  Papers (6)  |  Patents (1)
| | PDF (579 KB) | HTML

Label-free deoxyribonucleic acid (DNA) hybridization detection using carbon nanotube transistor (CNT) arrays is demonstrated. The present scheme is distinguished from other CNT sensing methods as it uses a gate oxide overlayer on top of the carbon nanotubes, which function solely as charge sensors but are not participants in the chemical binding process. Because it involves DNA probe attachment on... View full abstract»

• ### Systematic Aptamer-Gold Nanoparticle Colorimetry for Protein Detection: Thrombin

Publication Year: 2008, Page(s):661 - 666
Cited by:  Papers (12)
| | PDF (310 KB) | HTML

Gold nanoparticle colorimetry assay using aptamers is a low cost and a highly effective means for detecting a wide range of biomolecular targets. In this work, this technique is used to detect the protein thrombin as a model system for understanding the relationship between the aptamer-target binding properties and the optical colorimetric response, as well as to gain insight on the secondary stru... View full abstract»

• ### The Effect of Frequency Sweeping and Fluid Flow on Particle Trajectories in Ultrasonic Standing Waves

Publication Year: 2008, Page(s):667 - 677
Cited by:  Papers (7)  |  Patents (31)
| | PDF (604 KB) | HTML

Particle concentration and separation in ultrasonic standing waves through the action of the acoustic radiation force on suspended particles are discussed. The acoustic radiation force is a function of the density and compressibility of the fluid and the suspended particles. A two-dimensional theoretical model is developed for particle trajectory calculations. An electroacoustic model is used to p... View full abstract»

• ### Hybrid Micropower Source for Wireless Sensor Network

Publication Year: 2008, Page(s):678 - 681
Cited by:  Papers (35)
| | PDF (391 KB) | HTML

Wireless sensor networks have become a very significant enabling technology in many applications and the use of environmental energy is a feasible source for low-power wireless sensor networks. The challenges of developing a power supply including generation or conversion, storage, and power management are manifold to extend the lifetime of a wireless sensor network. The objective of this research... View full abstract»

• ### Sensor Support Systems for Asymmetric Threat Countermeasures

Publication Year: 2008, Page(s):682 - 692
Cited by:  Papers (4)
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In the past, primary focus has been given to novel sensor elements for deployment against urban terrorists and in limited force engagements. The issue explored in this paper is the adequacy of electronic system support for these new sensing elements. For example, ad hoc distributed networks must lie dormant for long periods of time and ldquocome aliverdquo when threats are nearby. This presents a ... View full abstract»

• ### Miniaturized Sensor for Microbial Pathogens DNA and Chemical Toxins

Publication Year: 2008, Page(s):693 - 700
Cited by:  Papers (12)
| | PDF (1056 KB) | HTML

A miniaturized, inexpensive and battery operated ultra-sensitive nanomaterial-based fluorescence resonance energy transfer (NSET) probe has been developed and evaluated for screening microbial pathogens DNA and chemical toxins at high sensitivity and selectivity. This paper illustrates application of the NSET portable device to detect microbial pathogens, e.g., Campylobacter, C. perfringens, and S... View full abstract»

• ### Electrospun Conducting Polymer-Based Sensors for Advanced Pathogen Detection

Publication Year: 2008, Page(s):701 - 705
Cited by:  Papers (13)  |  Patents (1)
| | PDF (2265 KB) | HTML

This paper focuses on the development of conducting polymer hybrid sensors for pathogen detection for advanced medical diagnostics. Using the electrospinning technique, polyaniline hybrids were developed for the detection of gas and for pH monitoring to determine the suitability of these sensors for exhaled human breath analyses. Results show that electrospun hybrids based on leucoemeraldine based... View full abstract»

• ### Advanced Agent Identification With Fluctuation-Enhanced Sensing

Publication Year: 2008, Page(s):706 - 713
Cited by:  Papers (27)
| | PDF (716 KB) | HTML

Conventional agent sensing methods normally use the steady state sensor values for agent classification. Many sensing elements (Hines , 1999; Ryan, 2004; Young, 2003;Qian, 2004; Qian, 2006; Carmel, 2003) are needed in order to correctly classify multiple agents in mixtures. Fluctuation-enhanced sensing (FES) looks beyond the steady-state values and extracts agent information from spectra and bispe... View full abstract»

• ### Fluctuation-Enhanced Sensing: Status and Perspectives

Publication Year: 2008, Page(s):714 - 719
Cited by:  Papers (15)
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Both selectivity and sensitivity of chemical sensors can be considerably improved by exploiting the information contained in microfluctuations present in the sensor system. We call our collection of methods and algorithms to extract information from these microfluctuations, fluctuation enhanced sensing. In this paper, we present a short survey of results with Taguchi sensors, surface acoustic wave... View full abstract»

• ### Nanomonitors: Protein Biosensors for Rapid Analyte Analysis

Publication Year: 2008, Page(s):720 - 723
Cited by:  Papers (23)  |  Patents (1)
| | PDF (619 KB) | HTML

A technology for electrical detection of proteins has been developed using electrical conductance measurements. It is based on developing high density, low-volume multiwell plate devices. The scientific core of this technology lies in integrating nanoporous membranes with microfabricated chip platforms. This results in the conversion of individual pores into wells of picoliter volume. Specific ant... View full abstract»

• ### III-Nitride Heterostructure Layered Tunnel Barriers For a Tunable Hyperspectral Detector

Publication Year: 2008, Page(s):724 - 729
Cited by:  Papers (2)
| | PDF (627 KB) | HTML

We report on the fabrication and characterization of Ill-nitride layered tunnel barriers with applications for a new type of tunable hyperspectral imaging detector with intrinsically hyperspectral pixels. This would enable each pixel to be individually tunable in real-time through a range of wavelengths, with the number and width of spectral channels being dynamically adjustable. Shape-engineered ... View full abstract»

• ### Synthesis of Ru-Ni Core-Shell Nanoparticles for Potential Sensor Applications

Publication Year: 2008, Page(s):730 - 734
Cited by:  Papers (15)
| | PDF (603 KB) | HTML

Nanoparticles of Ru-Ni with a core-and-shell structure were synthesized as potential sensors in a single-step spray-pyrolysis process at 700-1000. The majority of the core consists of ruthenium, while the shell is predominately composed of nickel. An aqueous precursor containing ruthenium chloride and nickel chloride was nebulized by an ultrasonic atomizer to generate an aerosol. The aerosol dropl... View full abstract»

• ### Metal Oxide Nanowire and Thin-Film-Based Gas Sensors for Chemical Warfare Simulants Detection

Publication Year: 2008, Page(s):735 - 742
Cited by:  Papers (31)
| | PDF (1378 KB) | HTML

This work concerns with metal oxide (MOX) gas sensors based on nanowires and thin films. We focus on chemical warfare agents (CWAs) detection to compare these materials from the functional point-of-view. We work with different chemicals including simulants for Sarin nerve agents, vescicant gases, cyanide agents, and analytes such as ethanol, acetone, ammonia, and carbon monoxide that can be produc... View full abstract»

• ### Optoelectronic Signatures of Biomolecules Including Hybrid Nanostructure-DNA Ensembles

Publication Year: 2008, Page(s):743 - 749
Cited by:  Papers (3)
| | PDF (1346 KB) | HTML

Biological macromolecules such as DNA, proteins, and polysaccharides often display unique absorptive signatures in the THz region, useful in their identification and imaging through Raman and Fourier transform transmission spectroscopy. The optoelectronic properties of nanostructure-DNA complexes immobilized on transparent, semi-rigid substrates such as polymethyl methacrylate (PMMA) have been stu... View full abstract»

• ### High-$T_{c}$ Josephson Square-Law Detectors and Hilbert Spectroscopy for Security Applications

Publication Year: 2008, Page(s):750 - 757
Cited by:  Papers (26)  |  Patents (1)
| | PDF (1537 KB) | HTML

Among various discussed ways of explosive detection, the techniques using electromagnetic radiation are considered as having great potential and research activities are recommended in this field. To identify new threats, like liquid explosives, with low rate of false alarms, fast spectral measurements are required in a broad frequency range from microwave to terahertz. We attract attention to a gr... View full abstract»

• ### Organizational Structure and Electronic Decoupling of Surface Bound Chiral Domains and Biomolecules

Publication Year: 2008, Page(s):758 - 766
Cited by:  Papers (4)
| | PDF (3176 KB) | HTML

For the development of reagentless biological and chemical species detection at the single molecule level using external fields, including terahertz radiation, it is paramount to study model systems that uncover how intermolecular and molecule-surface interactions dictate monolayer ordering and electronic properties. This paper addresses two types of molecule-surface interactions and two distinct ... View full abstract»

• ### Diffusive Transport in Graphene

Publication Year: 2008, Page(s):767 - 770
Cited by:  Papers (1)
| | PDF (187 KB) | HTML

Recently, a single-layer of carbon atoms, termed graphene, has attracted a great deal of interest due to its great potential for application in electronics. In experiments involving graphene, a finite residual conductivity was found at zero gate voltage in the density dependence of conductivity. However, the theoretical explanation of this observation has been confused, with derivations predicting... View full abstract»

• ### Radiative Plasmonic-Polariton Dispersion Relation for a Thin Metallic Foil With Interband Damping Transitions

Publication Year: 2008, Page(s):771 - 774
Cited by:  Papers (3)
| | PDF (116 KB) | HTML

Plasmons in a thin metallic foil are of two types: (Ritchie, 1957; Ando , 1982; Stratton, 1941) 1) a two-dimensional plasmon (Ritchie, 1957) whose electrostatic dispersion relation has its frequency proportional to the square root of wave number, which propagates along the surface of the foil and 2) a plasmon constituted of collective electron density oscillations across the foil in the nature of ... View full abstract»

• ### Characterization of Nanoporous Silicon-Based DNA Biosensor for the Detection of Salmonella Enteritidis

Publication Year: 2008, Page(s):775 - 780
Cited by:  Papers (36)
| | PDF (608 KB) | HTML

A biosensor for the detection of food-borne pathogens (Salmonella Enteritidis) was fabricated based on nanoporous silicon (NPS). P-type silicon wafers (100, 0.01 ) were anodized electrochemically in an electrochemical Teflon cell, containing ethanoic hydrofluoric acid solution to produce the porous layer on the silicon surface. The porous silicon surface was functionalized with DNA probes specific... View full abstract»

• ### THz Characterization of All-Trans and 9-cis Retinal, Experiment, and Modeling

Publication Year: 2008, Page(s):781 - 785
| | PDF (914 KB) | HTML

Two conformations of the retinal molecule have been studied in order to characterize the molecule's THz transmission spectra in both the ground and metastable states. When subjected to an adequate external excitation the retinal molecule can experience a change in conformation and associated THz transmission spectra. In an attempt to accomplish this characterization, the FTIR system was modified t... View full abstract»

• ### Noise Spectroscopy of Gas Sensors

Publication Year: 2008, Page(s):786 - 790
Cited by:  Papers (15)  |  Patents (1)
| | PDF (800 KB) | HTML

We study current-voltages and low-frequency noise characteristics of the metal-porous silicon-silicon single crystal-metal structure with 50% and 73% porosity of porous silicon. The study is performed in dry air and in a mix of dry air with carbon monoxide of different concentrations. The Hooge noise parameter and the parameter in the frequency dependence of the noise voltage spectral density were... View full abstract»

• ### Terahertz (THz) Electromagnetic Field Enhancement in Periodic Subwavelength Structures

Publication Year: 2008, Page(s):791 - 796
Cited by:  Papers (9)
| | PDF (337 KB) | HTML

In this paper, we show that periodic arrays of rectangular slots with subwavelength width provide for local electromagnetic field enhancements due to edge effects in low-frequency range, 10-25 cm<sup>-1</sup>. Periodic structures of Au, doped Si, and InSb with subwavelength thickness were studied. The half power enhancement width is ~500 nm and less around the slot edges in all cases, ... View full abstract»

## Aims & Scope

The IEEE Sensors Journal is a peer-reviewed, semi-monthly online journal devoted to sensors and sensing phenomena.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Sandro Carrara
École Polytechnique Fédérale de Lausanne (EPFL)
Lausanne, CH-1015 Switzerland
sandro.carrara@epfl.ch