Scientific discoveries - Essay Example

Comments (0) Cite this document
It is comes in several sizes and forms and employed as essential components with particular reference to the semiconductor industry. The explosion in…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.8% of users find it useful
Scientific discoveries
Read TextPreview

Extract of sample "Scientific discoveries"

Scientific Discoveries Introduction Diodes constitute an important and versatile component of the world of electronics, not much of which is clearto an outsider. It is comes in several sizes and forms and employed as essential components with particular reference to the semiconductor industry. The explosion in the field of electronics has led to the search for smaller, cheaper, faster, and more efficient diodes and this search has entered the nanoscale domain. (1).
The Molecular Diode
Constable and Somerville 2003, p.239, define nanotechnology as “manipulation of matter on atomic and molecular scales”. (2). Molecular electronics face two types of challenges. The first challenge is building molecular structures that act as switches and the second challenge is combining these molecules into a complex circuit in order that they are able to perform a specific function. These two tasks demand reproducible organic molecular conductors and insulators. Polyphenylene based molecules besides carbon nanotubes have been considered as possible candidate molecules capable of these tasks (3).
In October 2009 a team of researchers led by bio-designer N. J. Tao reported success in the development of key electrical component of the diode on a phenomenally tiny molecular scale, namely the single-molecule diode. (4).
Figure -1
Diodes constitute critical components for a wide range of applications that include power conversion equipment, radios, logic gates, photodetecters and light emitting devices. In all these applications diodes make up the components that permit current to flow in one direction, but not in the other direction in an electrical circuit. To bring this specific function down to the level of a molecule, the molecule should be physically asymmetrical, where one end of the molecule has the capacity to form a covalent bond with the negatively charged anode terminal and the other end capable of bonding with the positively charged cathode terminal. A symmetrical molecule allows current to flow in both directions, which is similar to an ordinary resistor. On the other hand an asymmetrical molecule allows current to flow in only direction similar to a diode, which is the more important and difficult component to replicate. With the size of a transistor in the field of electronics nearing a few ten nanometers or about twenty times larger than a molecule, the development of a molecular diode is exciting. (5).
The Tao led research team studied conjugated molecules for the purpose of developing a molecular diode. In conjugated molecules the atoms are stuck together by alternating single and multiple bonds. These molecules demonstrate strong electrical conductivity and also possess asymmetrical ends that have the capacity for spontaneously forming covalent bonds with metal electrodes to form a closed circuit, making the ideal candidates for development as molecular diodes. This exciting development allows examination of a single molecule through the application of a voltage, or a mechanical force, or an optical field, and measure current and the response. The behavior of single molecules is governed by the laws of quantum physics and this capability makes it possible to study the properties that are distinct from the properties in the behavior of conventional devices. (4).
The development of the molecular diode through the use of nanotechnology is an exciting advance, as it paves the way for smaller electronic devices, where diodes are employed and in addition stands out as an example of the benefits that can accrue from employing nanotechnology.
Works Cited
1. Harth, Richard. “Small ... smaller ... smallest? ASU researchers create molecular diode”. 2009. 23 October 2009. .
2. Constable, George & Somerville, Bob. A century of Innovation. Washington, D.C: Joseph Henry Press, 2003.
3. Kumar, Jagadesh. M. “Molecular Diodes and Applications”. Recent Patents on Nanotechnology, 1.1 (2007): 51-57.
4. Melville, Kate. “Nanotronics within reach with creation of molecule-sized diode”. 2009. 23 October 2009. .
5. “Smallest Electronic Component: Researchers Create Molecular Diode”. 2009. ScienceDaily. 23 October 2009. . Read More
Cite this document
  • APA
  • MLA
(“Scientific discoveries Essay Example | Topics and Well Written Essays - 500 words”, n.d.)
Retrieved from
(Scientific Discoveries Essay Example | Topics and Well Written Essays - 500 Words)
“Scientific Discoveries Essay Example | Topics and Well Written Essays - 500 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Scientific discoveries

Critical review of Karl Poppers book: The Logic of Scientific Discoveries

...? Critical review of Karl Poppers’ The Logic of Scientific Discoveries Introduction Karl Popper is characterizes as “the most prominent” proponent of “logical decuctionism” in the 20th century (Turner 2006, 343). Popper’s The Logic of Scientific Discovery first published in 1934 has emerged as the 20th century’s model for deductionism (Turner 2006, 343). Essentially, Popper’s deductive theory sets out to draw distinctions between theoretical assumptions and empirical analyses. In short, Popper rejects the view that empirical analyses are used to prove or disprove a theory, but rather puts forth the view that empirical analyses are used to validate or justify a theory. The...
15 Pages(3750 words)Thesis

Inventions and Discoveries

...motion. Kepler was succeeded in giving scientific base to the discoveries of Galileo. Kepler described the planetary motion with the help of the atom model. In an atom, nucleus remains at the centre and all the heavier particles like protons and neutrons are located at the nucleus. The lighter particles electrons rotate around the atomic nucleus in fixed orbits. Because of the huge mass of the nucleons compared to the mass of the electrons, the nucleus was able attract the electrons towards the centre with the help of centripetal force and thus the electrons were able to remain in the fixed orbits. Same way, in the solar system, sun possesses masses more than 100 times that of the planets and it stays at...
4 Pages(1000 words)Term Paper

To what extent do recent scientific discoveries in Europe reflect rise and fall in religious observants

...? To what extent do recent scientific discoveries in Europe reflect rise and fall in religious observant Introduction: Religion and Europe have been in conflict in Europe over the years. Right from the establishment of Christendom to the popularity of secularism, religious beliefs and science have clashed on different grounds. Many new theories and discoveries of science do not support religion as an ultimate resort. This attitude has led to serious ideological clashes between the two sects that have led the common man into a never ending dilemma. In medieval Europe religious persecutions based on discriminating scientific discoveries were common. The...
8 Pages(2000 words)Essay

AStronomy Discoveries

... intellectual and financial capital for that venture. However, if the astrophysics can make it, the discovery of extraterrestrial life will be the most wonderful scientific experience for the expansion of civilization and the most promising window for growing from globalization to ‘universalization’ of mankind. On the other end, it may also influence our values of life and spirituality when we realize that we are not unique. With the conformation of extraterrestrial inhabitations, life will be considered as a normal part of the evolution of the Universe rather than a special event confined to Earth. Once if the intensive fictional approaches and herculean attempts in researches substantiate the belief of people in such discoveries... ?(Add...
4 Pages(1000 words)Research Paper

Recent Discoveries in Egypt

...Considering how ancient Egyptian culture is, and the vast time period that it covers, it has remained the object of scholastic focus for a surprisingly long time. Even more surprising is that new discoveries keep being made. While Egyptologists have generally reached agreement about a number of key elements and dates, studies made by authorities on either related fringe elements, or different fields entirely, continue to make the “authorities” work to defend their positions. Dr. Joann Fletcher has recently asserted claims to have determined the actual mummy of Nefertiti. Robert M. Schoch, Ph.D., has studied geological evidence that could completely overturn many pre-conceptions about the construction of the Sphinx and...
25 Pages(6250 words)Essay

Pompeii Discoveries

...The Truth of Pompeii In the year 79 AD, a volcano no one realized was still active suddenly made itself known. Had anyone known how to recognize the signs, they might have been well-warned as many as 17 years earlier, when the volcano touched off a massive earthquake that destroyed buildings and streets all around the great mountain. As it was, however, no one realized the earlier large earthquake or the number of small earthquakes that had begun to be felt with the beginning of August heralded disaster for the bustling Roman port city of Pompeii. When the volcano erupted, the city was buried under layers of ash that would keep it hidden, and preserved, for centuries before its rediscovery in the 1700s. Following the discovery... > “The...
4 Pages(1000 words)Essay

Inventions & Discoveries

...Macro and Micro economics Inventions and Discoveries: Coca-Cola A) The origins of the advance, discovery, or invention Coca-Cola Company was established in 1886 and it has grown to become a leading manufacturer, distributor, and marketers of non-alcoholic beverages (Coca-Cola Company, 1). Moreover, they involve distribution of concentrates and syrups that are used for production of more than two hundred brands of beverages. This Company was stated in Atlanta, where their corporate headquarters are located; in fact, they have grown, thereby venturing into international markets and operating in more than two hundred countries in the around the world. B) Its impact on the development of global human...
2 Pages(500 words)Essay

Freuds Discoveries about the Language of Dreams

...instrumental in understanding various phenomena, however, this paper will attempt to look at the three areas and examine the significance of Freud’s perspectives. Significance of Freud’s discoveries about the language of dreams Whenever we are sleeping, every person does experience some form of dreams concerning different events. Some dreams are usually about what one was doing or taking part in during the day, while other dreams may be about different things. The concept of dreams has been a controversial issue in many people, with many trying to understand the mechanisms under which people experience dreams and whether they are an indication of any thing in real world; this is the central point of discussion in this...
4 Pages(1000 words)Admission/Application Essay

Clash of science and religion

...Conflict between Science and Religion Affiliation Conflict between Science and Religion The compatibility between science and religion is minimal. Numerous scientific discoveries have been cited as unethical by religion. The proneness to conflict between the two factors is prompted by the fact that the two forms of perception draw evidence from different sources (Geoffrey, 2011). Science is based on physical or experimental evidence while religion is based on beliefs obtained from holistic readings. One scientific discovery criticized for its religious appropriateness is human evolution. Science describes evolution as a way that man developed from one animal species to...
2 Pages(500 words)Essay


...Recombinant DNA technology Recombinant DNA technology In obtaining the three plasmid DNA including A2-F, pFR-Luc, and Gal4, the study employed use of Luria broth and plasmid cloning techniques. Essentially, Luria broth defines a a bacteria culture media that with high nutrients used in laboratories. In addition, isolation of specific DNA sequences from complexes of varied sequences of DNA relates to DNA cloning (Walker and Rapley, 2009, p. 115). Plasmid or highly modified phage acts as vectors for replication of DNA fragment during cloning in a host cell. The inherent plasmid vector consists of three elements including cloning site, drug-resistance gene, and a replication origin (Stuttard and Rozee, 2013, p. 180). The latter... DNA technology ...
2 Pages(500 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Scientific discoveries for FREE!

Contact Us