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Showing Spotlights 433 - 440 of 458 in category Fabrication Technologies and Devices (newest first):


Constructing smart nanomaterials with DNA molecules

Researchers at the University of Illinois at Urbana-Champaign have shown that, by employing small pieces of DNA molecules called aptamers, nanomaterials can be smart enough to assemble or disassemble only in the presence of programmable signals such as AND or OR, with controllable cooperativity.

Posted: Jul 13th, 2006

Oscillating pattern in nanoparticle crystallization

In order to survive, biological systems need to form patterns and organize themselves. Scientists at the Max Planck Institute for Colloids and Interfaces (MPI-KG) in Potsdam, Germany, have now combined self-organization with chemical pattern formation. They demonstrated that oscillating reaction patterns like that of a Belousov-Zhabotinsky reaction can not only be generated in a one-phase system like in all previous examples but also in a two-phase system like liquid-solid.

Posted: Jul 12th, 2006

Mass-producible replication of highly hydrophobic surfaces from plant leaves

Superhydrophobic surfaces, such as lotus leaves, with micro/nano combined structures found in nature have attracted a lot of interest because of their importance in fundamental research and practical applications such as self cleaning, anti-fogging/snowing, drag reduction effect etc. In this regard, diverse methods have been proposed to produce such surfaces. However, most of the reported methods in the literature generally require a cleanroom-based process or complex chemical processes and have some limitations in terms of mass-production capability and material selectivity.

Posted: Jul 11th, 2006

Turning silver into gold - at least on the nanoscale

The color of metal colloids is highly dependent on their size and therefore being able to control the size is very important to tune the metal colors systematically. By controlling the wavelength of optical resonance of metal nanoparticles and their composition, researchers in South Korea have found a way to fabricate various colored metal colloids both easily and reproducibly. These findings could be very useful for biological assays.

Posted: Jul 10th, 2006

A novel method for mass production of nanotube based electronics

The mass production of nanoelectronic devices has been hampered by difficulties in aligning and integrating the millions of nanotubes required for the job. Now, researchers in South Korea have developed a method to precisely assemble and align single-walled carbon nanotubes (SWCNTs) onto solid substrates without relying on external forces such as electric or magnetic fields. This result could be an important guideline for the large-scale directed-assembly of integrated devices based on SWCNTs.

Posted: Jul 5th, 2006

Biomolecules as novel templates for the fabrication of nanostructures

Applying atomic layer deposition (ALD) to biological macromolecules opens a route to fabricate metal oxide nanotubes and thin films with embedded biomolecules. The combination of biomaterials and ALD does not yet allow for a construction of a device. However, there are some indications that the synthesis of thin films with embedded functional biomolecules, such as ferritin, might be suitable for e.g. flexible electronics.

Posted: Jun 29th, 2006

The challenge of synthesizing magnetic nanostructures

The scientific interest in magnetic nanostructures, both from a fundamental viewpoint and also due to their potential in a wide range of applications, over the past few years has led researchers to develop various nanofabrication methods for synthesizing nanomagnets. Applications for nanomagnetic materials include non-volatile magnetic random access memory (MRAM), highly sensitive magnetic field sensor, field programmable spin logic, and patterned media for ultra high density data storage.

Posted: Jun 20th, 2006

Controlled decoration of carbon nanotubes with nanoparticles

A newly developed electrostatic force directed assembly (ESFDA) technique is used to efficiently coat carbon nanotubes (CNTs) with nanoparticles. This new method advances the current technology by enabling rapid and in-situ coating of CNTs, multicomponent hybrid nanostructures, more control over the assembly process, and the possibility of tuning properties of the resulted hybrid structures.

Posted: Jun 7th, 2006