Showing Spotlights 121 - 128 of 148 in category General Nanotechnology (newest first):
Scientists are intensely researching how animals like spiders and geckos generate the high adhesion force that allows them to cling to walls and walk on ceilings, feet over their head. While this research so far has focused on novel materials like carbon nanotubes to replicate spider feet and gecko toes, a key challenge for materials engineers is the scaling up of such materials from small animals to, say, spiderman gloves that support a fully grown human. Complementing the ongoing gecko biomimetic materials research, Nicola M. Pugno, an Associate Professor of Structural Mechanics at the Politecnico di Torino in Italy, has developed what he termed Adhesive Optimization Laws.
Dec 3rd, 2008
Titanium dioxide nanoparticles have become a commercially significant nanomaterial and are being used in products around the world - in cosmetics and sunscreen lotions, paint formulations, coatings, self-cleaning additives, even in antibacterial applications. The increased use of nanomaterials such as titania goes hand in hand with a growing number of reports on the risks associated with these materials, which have arisen because insufficient information has been gathered about their reactivity and stability once they leave the laboratory. Unfortunately, pinpointing every conceivable situation that nanoparticles could interact in is an enormous multi-parameter problem and solving this by experimental testing alone is not feasible due to the huge numbers of combinatorial variations. This is where theoretical predictions can help, by rapidly and systematically sampling possibilities, and highlighting where experimentalists should focus their attention.
Nov 19th, 2008
Poll after poll shows that most people today, assuming they have even heard the term, don't understand what nanotechnology is. Those who have heard about it are often misinformed by science fiction books and movies or tend to either focus on hype or fear surrounding available information about nanotechnologies. A team of scientists have described the key issues quite nicely: There is a general recognition that few people understand the implications of the technology, the technology itself or even the definition of the word. This lack of understanding stems from a lack of knowledge about science in general but more specifically difficulty in grasping the size scale and symbolism of nanotechnology. A potential key to informing the general public is establishing the ability to comprehend the scale of nanotechnology. Transitioning from the macro to the nanoscale seems to require an ability to comprehend scales of one-billion. Scaling is a skill not common in most individuals and tests of their ability to extrapolate size based upon scaling a common object demonstrates that most individuals cannot scale to the extent needed to make the transition to nanoscale.
Oct 17th, 2008
Travel through wormholes, time machines and hovering landspeeders are the stuff of science fiction novels. Nevertheless, scientists have suggested that the quantum mechanics of something called the Casimir effect can be used to produce a locally mass-negative region of space-time, a phenomenon that theoretically could be used to stabilize a wormhole to allow faster than light trave. For many years the Casimir effect was little more than a theoretical curiosity. With the advances in micro- and nanotechnology and the fact that the Casimir force affects nanoscale devices such as NEMS, research in detecting and manipulating this mysterious force has generated substantial interest. Now, the secretive DARPA, a research agency of the U.S. Department of Defense that often dabbles in far-out technologies - and that also brought us the Internet's predecessor ARPANET - is soliciting innovative research proposals in the area of Casimir Effect Enhancement.
Sep 19th, 2008
The term 'mechanical engineering' generally describes the branch of engineering that deals with the design and construction and operation of machines and other mechanical systems. Students training to become engineering professionals have to delve into subjects such as instrumentation and measurement, thermodynamics, statics and dynamics, heat transfer, strengths of materials and solid mechanics with instruction in CAD and CAM, energy conversion, fluid dynamics and mechanics, kinematics, hydraulics and pneumatics, engineering design and so on. If you are currently doing coursework in mechanical engineering, better add nanotechnology courses to your core curriculum.
Aug 18th, 2008
The Office of Technology Assessment at the German Parliament (TAB) has released a massive 266-pages report on Converging Technologies (CT). The report's author, Christopher Coenen, analyses CT-related political initiatives and activities in the USA, European Union and Germany as well as some other countries. Utopian and dystopian long term visions for Converging Technologies and Human Enhancement offer clear potential for social conflict. Most of the discussions have so far been limited to academic circles, but some have reached political relevance. These focus on the relationship between nature and technology and between the grown and the artificial. Differences in views on what it means to be human are central to these disputes. The criticism against promoters of convergence visions is that the feasibility is doubtful and that the views are inspired by political and ideological motives. The report outlines options for actions and the possible requirements for research and he ends his report by suggesting options for research funding.
Jul 30th, 2008
Archaeological evidence indicates that ancient Chinese and Babylonian civilizations already were using fingerprints to sign legal documents as early as 1000 BCE. As early as 1880, Dr Henry Faulds, an English physician working in Tokyo, published a letter in the journal Nature suggesting the use of fingerprints for identification purposes. Today, fingerprints are still the primary method of identification of criminals although the techniques for fingerprint detection and enhancement have become hi-tech and involve nanotechnology applications. The most problematic of fingerprints are latent prints that are not readily visible and that require development by chemical and/or physical means. Usually, the choice of the technique for fingerprint development is dependent on the composition of latent fingerprints, on the type of substrate and on the ability of the technique to be applied in sequence in the context of the case. A new review paper describes the current status of nanotechnology-based techniques such as application of metal-containing nanoparticles and nano-structured particles to fingermark detection. It concluds that nanotechnology is likely to play a major role in the future to deliver more selective and more sensitive ways to detect and enhance fingermarks.
Jul 7th, 2008
Consider this: in fields like nanosciences and nanotechnology the knowledge doubles in as little as five years, making a student's education obsolete even before graduation. But while the knowledge is growing exponentially, the established mechanism of getting this knowledge into the public domain has not changed much. This begs the question if the traditional scientific paper publishing model is still adequate and able to cope with the fast pace of how things develop in the scientific world. It can take up to two years from the time a scientific study is conducted to the actual publication of its findings in a paper in a peer-reviewed journal. By then, the underlying research might already be out of date.
Jun 11th, 2008