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Nano Electro-Mechanical Systems (NEMS) are tiny
machines built at the nanometer scale. Current
NEMS applications are simple machines, such as
the tiny cantilever shown at the right. An electrical circuit measures the deflection
of the lever. A larger version of this device,
with dimensions at the micrometer or millimeter
scale, is commonly used as an airbag sensor in
automobiles. A sudden stop causes a strong
deflection of the lever, which signals that
the airbags should be deployed. At the nano
scale, such a lever is sensitive enough to
measure the weight of individual atoms or
molecules resting upon it.
Learn more about NEMS from the
resources available on this site, listed below.
Sensing Technology Needs in Long-Term Human Space Exploration
out of 5 stars
27 Jul 2005 |
The sensing technologies are mainly derived from three broad areas, namely, absorbance, fluorescence and electrochemical. The development of a sensing system with unique requirements for space applications in these areas will be addressed. The application of these sensing systems in Tissue...
Introduction to Molecular Conduction
21 Jul 2005 | | Contributor(s):: Ferdows Zahid, Magnus Paulsson, Avik Ghosh, Supriyo Datta
A scanning probe microscope brushes the tips of molecules rising up from a gold substrate. After making contact, the probe measures a very strange current-voltage relationship--linear portions separated by flat spots or sharp increases. Definitely not Ohm's law. Is the experiment correct?...
2005 Molecular Conduction and Sensors Workshop
This is the 3rd in a series of annual workshops on Molecular Conduction. The prior workshops have been at Purdue University, W. Lafayette, IN (2003) and Nothwestern University, Evanston, IL (2004). The workshop has been an informal and open venue for discussing new results, key challenges, and...
An Introduction to BioMEMS and Bionanotechnology
07 Feb 2005 | | Contributor(s):: Rashid Bashir
This lecture series introduces the basic concepts and key topics underlying the interdisciplinary areas of BioMEMS and Bionanotechnology. Advances in this field require the knowledge of polymer processing and soft lithography in addition to knowledge of silicon-inspired fabrication. Since the...
Synthesis & Mechanics of Nanostructures & Nanocomposites
08 Apr 2005 | | Contributor(s):: Rod Ruoff
Synthesis & Mechanics of Nanostructures & Nanocomposites
08 Apr 2005 | | Contributor(s):: Narayan Aluru
In this talk, I will present our recent results on computational analysis of electric field mediated transport of liquids and electrolytes in nanochannels.
Computational Studies of Confined & Externally Flowing Gases on the Mechanical Properties of Carbon
08 Apr 2005 | | Contributor(s):: Susan Sinnott
Historically, molecular dynamics simulations have played an important role in elucidating the mechanical responses of carbon nanotubes to external forces. Here, they are used to explore the interactions of carbon nanotubes with gases that are either confined to the nanotube interiors or are...
Electrochemical Gating and Molecular Adsorption on Carbon Nanotubes
08 Apr 2005 |
Highly sensitive response of semiconducting single-walled carbon naotubes (SWNTs) to molecular adsorption provides a simple and effective direction in exploiting their unique electrical properties. For example, simultaneous doping and nearly ideal gate efficiencies are achieved with polymer...
Gated Chemical Transport through Vertically Aligned Carbon Nanotube Membranes
A promising architecture for ion-channel mimetics is a composite membrane structure containing vertically aligned carbon nanotubes, with inner core diameters of 7 nm, passing across a polystyrene matrix film. Plasma oxidation during the fabrication process introduces carboxylic acid groups on...
Simulation of Multi-Technology Micro and Nano Systems
08 Apr 2005 | | Contributor(s):: Kartikeya Mayaram
The simulation of a mixed-technology micro or nano system is an extremely challenging task because of the different types of on-chip components for sensing, actuation, data storage, and information processing. Integrated circuit and device simulators are a promising approach for simulating such...
Simulation of Sub-Micron Thermal Transport in Semi-Conduction and Dielectrics
08 Apr 2005 | | Contributor(s):: Jayathi Murthy
In recent years, there has been increasing interest in understanding thermal phenomena at the sub-micron scale. Applications have included the thermal performance of microelectronic devices, thermo-electric energy conversion, ultra-fast laser machining and many others. More recently,...
System Approach to Control Cells
Nature has evolved extremely intelligent and complex adaptive systems for driving the processes of everyday life. For example, a cell fuses genetic processes with nanoscale sensors and actuators to result in perhaps one of the most efficient autonomous micro “factories". These basic processes...
Thermal Conductance of solid-Solid and Solid-Liquid Interfaces
08 Apr 2005 | | Contributor(s):: David Cahill
The thermal conductance of interfaces is a key factor in controlling thermal conduction in nanostructured materials, composites, and individual nanostructures. We have recently advanced the state-of-the-art of time-domain-thermoreflectance (TDTR) measurements of thermal transport and are using...
Unraveling the Behavior of Liquids at the Nanoscale
To better understand the transport of simple and complex liquids under extreme confinement conditions, our research group is conducting fluid flow experiments in conduits consisting of carbon nanotubes. Carbon nanotubes are a convenient material with which to work for several reasons. First,...
Nanotechnology-Enabled Direct Energy Conversion
25 Mar 2005 | | Contributor(s):: Gang Chen
Energy transport in nanostructures differs significantly from macrostructures because of classical and quantum size effects on energy carriers such as on phonons, electrons, photons, and molecules. Nanoscale effects can be tailored to develop more efficient direct energy conversion technologies...
Self-Heating and Scaling of Silicon Nano-Transistors
05 Aug 2004 | | Contributor(s):: Eric Pop
The most often cited technological roadblock of nanoscale electronics is the "power problem," i.e. power densities and device temperatures reaching levels that will prevent their reliable operation. Technology roadmap (ITRS) requirements are expected to lead to more heat dissipation problems,...
Nanotechnology 501 Lecture Series
22 Feb 2005 | | Contributor(s):: Gerhard Klimeck (editor), Mark Lundstrom (editor), Joseph M. Cychosz (editor)
Welcome to Nanotechnology 501, a series of lectures designed to provide an introduction to nanotechnology. This series is similar to our popular lecture series Nanotechnology 101, but it is directed at the graduate students and professionals.
Lecture 4: Sensing Methodologies (cont), Integrated BioMEMS and Nanodevices
Lecture 3: Microfluidic Transport (cont), Sensing Methodologies
Lecture 2: Essentials of Microbiology, Introduction to Microfluidics