Navigation Links
A giant step in a miniature world: UZH researcher measures the electrical charge of nano particles
Date:7/30/2012

In order to observe the individual particles in a solution, Prof. Madhavi Krishnan and her co-workers entice each particle into an electrostatic trap. It works like this: between two glass plates the size of a chip, the researchers create thousands of round energy holes. The trick is that these holes have just a weak electrostatic charge. The scientists than add a drop of the solution to the plates, whereupon each particle falls into an energy hole and remains trapped there. But the particles do not remain motionless in their trap. Instead, molecules in the solution collide with them continuously, causing the particles to move in a circular motion. We measure these movements, and are then able to determine the charge of each individual particle, explains Prof. Madhavi Krishnan.

Put simply, particles with just a small charge make large circular movements in their traps, while those with a high charge move in small circles. This phenomenon can be compared to that of a light-weight ball which, when thrown, travels further than a heavy one. The US physicist Robert A. Millikan used a similar method 100 years ago in his oil drop experiment to determine the velocity of electrically charged oil drops. In 1923, he received the Nobel Prize in physics in recognition of his achievements. But he examined the drops in a vacuum, Prof. Krishnan explains. We on the other hand are examining nano particles in a solution which itself influences the properties of the particles.

Electrostatic charge of nano drugs packages

For all solutions manufactured industrially, the electrical charge of the nano particles contained therein is also of primary interest, because it is the electrical charge that allows a fluid solution to remain stable and not to develop a lumpy consistency. With our new method, we get a picture of the entire suspension along with all of the particles contained in it, emphasizes Prof. Madhavi Krishnan. A suspension is a fluid in whi
'/>"/>

Contact: Prof. Dr. Madhavi Krishnan
madhavi.krishnan@uzh.ch
41-446-354-465
University of Zurich
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Exotic particles, chilled and trapped, form giant matter wave
2. picoSpin-45 Miniature NMR Spectrometer Wins R&D 100 Award
3. SRI International Researchers Developing Bioadhesive Gel to Protect Women from HIV and HSV Infections
4. Researchers create highly conductive and elastic conductors using silver nanowires
5. Researchers create rubber-band electronics
6. Cedars-Sinai researchers, with stem cells and global colleagues, develop Huntingtons research tool
7. Penn researchers study of phase change materials could lead to better computer memory
8. Researchers tune the strain in graphene drumheads to create quantum dots
9. WHEATON® Introduces a New Web Community for Scientists, Researchers, and Biopharmaceutical Packagers
10. Stevenage Bioscience Catalyst to Welcome Cambridge University Researchers
11. Syracuse University researchers use nanotechnology to harness power of fireflies
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A giant step in a miniature world: UZH researcher measures the electrical charge of nano particles
(Date:9/17/2014)... , Sept. 17, 2014  PDL BioPharma, Inc. (PDL) (NASDAQ: ... registered accounting firm, Ernst & Young LLP ("EY") that it ... in a letter delivered to the Company on September 15, ... 16, 2014.  PDL has issued the following ... received a number of inquiries on the reason for the ...
(Date:9/17/2014)... 17, 2014 A long-term retrospective study ... irradiation (APBI) via interstitial brachytherapy suggests that women ... nodes could be suitable to receive the treatment. ... place these patients in the "unsuitable" category for ... ASTRO meeting, Beaumont Health System,s Peter Y. ...
(Date:9/17/2014)... 17, 2014 The global consumption of squalene / ... is a natural skin-identical chemical that finds applications in various ... supplements, pharmaceuticals, and in other applications like high grade lubrication, ... a few major players and is regionally segregated. Sophim ( ... Oil Co. Ltd. ( Japan ), SeaDragon Marine ...
(Date:9/17/2014)... , Sept. 17, 2014 /PRNewswire/ - Oncothyreon Inc. ... intends to offer and sell shares of its Common ... but concurrent underwritten public offerings.  The Series A Convertible ... Oncothyreon Common Stock, provided that conversion will be prohibited ... would beneficially own more than 4.99% of the Common ...
Breaking Biology Technology:PDL BioPharma Issues Statement on Resignation of Ernst and Young as Corporate Auditors 2PDL BioPharma Issues Statement on Resignation of Ernst and Young as Corporate Auditors 3Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 2Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 3Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 4Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 2Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 3Oncothyreon Announces Proposed Public Offerings 2
... made the honor roll of a national economic development assessment ... , ,The 2006 Development Report Card for the States, released ... the state an A in performance and Bs in business ... there were a few stinkers hidden in the subcategories that ...
... Lori Holder-Webb , an assistant professor of accounting and ... Business, is part of a four-person research team recently ... NASD Investor Education Foundation recently awarded more ... both of the School of Management of Boston College, ...
... Visonex will receive $109,000 in loans ... office said. The company provides web-based disease management software for ... to hire nine people as part of its current growth ... money includes: , , $100,000 loan from the Technology ...
Cached Biology Technology:
(Date:9/17/2014)... health care to reproductive technologies, the justice and ... of people to identify key issues, articulate their ... find the most defensible ways forward. But what ... societal conversations?, The Hastings Center and the Presidential ... teamed up to publish a series of essays ...
(Date:9/17/2014)... of the Santa Ana Wildfire Threat Index a ... the powerful, hot, dry Santa Ana wind, which can ... introduced Sept. 17 by the U.S. Forest Service, in ... , The index includes four classification levels ranging from ... fire agencies and other emergency responders, the media and ...
(Date:9/17/2014)... the Arts and Humanities has received a $260,000 grant ... project, "The Boundaries of the Human in the Age ... a wide-ranging series of events aimed at exploring two ... artists and researchers who are exploring the boundaries of ... humanism, and the other involves the increasingly influential hypothesis ...
Breaking Biology News(10 mins):Why bioethics literacy matters 2Why bioethics literacy matters 3UCLA scientists play key role in developing new Santa Ana Wildfire Threat Index 2Mellon Foundation awards grant for major project in the humanities and sciences 2
... of life imitating art, avian scents given off by male ... Michigan State University researcher revealed the process of how males ... issue of Behavioral Ecology . Scents are used in ... evaluating mates. But this is the first study of its ...
... dopamine is best known for its roles in the ... reward, learning and memory. Now, Vanderbilt University Medical Center ... in the kidneys is important for renal ... published in the July Journal of Clinical Investigation ...
... July 19, 2011 -- How is it that a disc-like ... into an elongated embryo? This mechanism is a mystery ... The first significant step towards understanding the issue was made ... embryologists Hans Spemann and Hilde Mangold. The two used early ...
Cached Biology News:Avian 'Axe effect' attracts attention of females and males 2Kidney dopamine regulates blood pressure, life span 2Hebrew U. scientists show for first time how early human embryo acquires its shape 2
Mouse monoclonal antibody raised against a partial recombinant PRG4. NCBI Entrez Gene ID = PRG4...
Mouse monoclonal antibody raised against a partial recombinant SCARB2. NCBI Entrez Gene ID = SCARB2...
...
Mouse polyclonal antibody raised against a partial recombinant CSRP3. NCBI Entrez Gene ID = 8048...
Biology Products: