Recently portable Raman probes have emerged along with a variety of applications, including carbon nanotube (CNT) characterization. Aqueous dispersed CNTs have shown promise for biomedical applications such as drug/gene delivery vectors, photo-thermal therapy, and photoacoustic imaging. In this study we report the simultaneous detection and irradiation of carbon nanotubes in 2D monolayers of ca...

We use an atomic force microscope (AFM) tip to locally probe the electronic properties of semiconducting carbon nanotube transistors. A gold-coated AFM tip serves as a voltage or current probe in three-probe measurement setup. Using the tip as a movable current probe, we investigate the scaling of the device properties with channel length. Using the tip as a voltage probe, we study the properti...

Carbon nanotubes are nanocomponents par excellence that offer unique properties to be exploited in next-generation devices. Sensing applications are perhaps the class that has most to gain from single-walled carbon nanotubes (SWNTs); virtually any property of SWNTs (e.g., electronic, electrical, mechanical, and optical) can result or has already resulted in sensor concept demonstrators. The bas...

A simple, inexpensive analogue subtraction method for measuring thermoelectrical power from 4 to 300 K using two chromel (KP)/Au–7 at% Fe (Au:Fe) thermocouples is described. The average sample temperature is varied by lowering a small insert probe into a liquid-He-storage container or raising the probe. Details concerning the interface of the experiment to a personal computer are presented. Dat...

We performed four-terminal conductivity measurements on a CoSi2 nanowire (NW) at room temperature by using PtIr-coated carbon nanotube (CNT) tips in a four-tip scanning tunneling microscope. The physical stability and high aspect ratio of the CNT tips made it possible to reduce the probe spacing down to ca. 30 nm. The probe-spacing dependence of resistance showed diffusive transport even at 30 ...

An iron filled carbon nanotube (FeCNT), a 10-40 nm ferromagnetic nanowire enclosed in a protective carbon tube, is an attractive candidate for a magnetic force microscopy (MFM) probe as it provides a mechanically and chemically robust, nanoscale probe. We demonstrate the probe's capabilities with images of the magnetic field gradients close to the surface of a Py dot in both the multi-domain an...

This article provides an overview of nanotechnology and biotechnology research at NASA Ames Research Center and covers current results in the areas of carbon nanotube (CNT) growth and characterization and functionalization, nanotubes in scanning probe microscopy, inorganic nanowires, biosensors, chemical sensors, nanoelectronics optoelectronics, computational nanotechnology, quantum device simu...

Please cite the original version: Roschier, Leif & Penttilä, Jari & Martin, Michel & Hakonen, Pertti J. & Paalanen, Mikko & Tapper, Unto & Kauppinen, Esko I. & Journet, Catherine & Bernier, Patrick. 1999. Single-electron transistor made of multiwalled carbon nanotube using scanning probe manipulation. Applied Physics Letters. Volume 75, Issue 5. 728-730. ISSN 0003-6951 (printed). DOI: 10.1063/1...

The inclusion of carbon nanotubes in polymer matrix has been proposed to enhance the polymer’s physical and electrical properties. In this study, microscopic and spectroscopic techniques are used to investigate the interaction between poly(3-hexylthiophene) (P3HT) and nanotubes and the reciprocal modification of physical properties. The presence of P3HT-covered nanotubes dispersed in the polyme...

Atomic force microscopy (AFM) has great potential as a tool for structural biology, a field in which there is increasing demand to characterize larger and more complex biomolecular systems. However, the poorly characterized silicon and silicon nitride probe tips currently employed in AFM limit its biological applications. Carbon nanotubes represent ideal AFM tip materials due to their small dia...