Navigation Links
Ions control shape of nanofibers grown on clear substrate
Date:8/16/2011

field in the chamber that excites the atoms in the acetylene and ammonia gas. Some of the electrons in these atoms break away, creating free electrons and positively charged atoms called ions. The free electrons accelerate around the chamber, knocking loose even more electrons. The positively charged ions are drawn to the negatively charged grid on the floor of the chamber.

Meanwhile, the nickel nanoparticles are serving as catalysts, reacting with the carbon in the acetylene gas (C2H2) to create graphitic carbon nanofibers. The catalyst rides on the tip of the nanofiber that forms beneath it, like a rapidly growing pillar. The term graphitic means that the nanofibers have carbon atoms arranged in a hexagonal structure like graphite.

One problem with growing carbon nanofibers is that the surface of the catalyst can become obstructed by a carbon film that blocks catalytic action, preventing further nanofibers growth. Here's where those ions come in.

The ions being drawn to the chromium grid are moving very quickly, and they choose the shortest possible route to reach the negatively-charged metal. In their rush to reach the grid, the ions often collide with the nickel catalysts, knocking off the excess carbon and allowing further nanofibers growth.

Because the ions are being drawn to the chromium grid, the angle at which they strike the catalysts depends on where the catalyst is located relative to the grid. For example, if you are looking down at the grid, a catalyst just to the right of the grid will appear to be leaning right because ions would have been striking the right side of the catalyst in an attempt to reach the grid. These nanofibers are still straight they don't curl up they simply lean in one direction. The bulk of the nanofibers, however, are both straight and vertically aligned.

"This finding gives us an opportunity to create new reactors for creating nanofibers, building in the chromium grid," Me
'/>"/>

Contact: Matt Shipman
matt_shipman@ncsu.edu
919-515-6386
North Carolina State University
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Light propagation controlled in photonic chips -- major breakthrough in telecommunications field
2. Researchers engineer the environment for stem cell development to control differentiation
3. Life Technologies Signs Exclusive License Agreement for TAL Effector Technology That Enables Synthetic Biologists to Precisely Control Gene Expression in Engineered Organisms
4. David H. Murdock Research Institute Assumes Control of the Immune Tolerance Institute and Establishes a State of the Art Human Immune Monitoring Laboratory for Biomarker Discovery and Development
5. UCLA researchers now 1 step closer to controlled engineering of nanocatalysts
6. Finesse Launches the VirtualTransmitter Module and TruFluor Transmitter Blades for Seamless Integration of Single-Use Sensors Into Bioreactor Control
7. Disease Control App for Doctors Wins Health 2.0 Data Challenge, Analyze This!
8. Berkeley Lab scientists control light scattering in graphene
9. Structured Diabetes Management can Significantly Improve Overall Glycemic Control and Reduce HbA1c Values in Non-insulin Treated Type 2 Diabetes
10. New research shows how light can control electrical properties of graphene
11. TU scientists in Nature: Better control of building blocks for quantum computer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ions control shape of nanofibers grown on clear substrate
(Date:12/22/2014)... MISSION VIEJO, Calif. , Dec. 22, 2014 /PRNewswire/ ... announce that CoPatient, an online medical bill review and ... newest offering in the FREE WellCard Savings discount health ... a medical bill that was more than they expected ... help members reduce health care costs, WellCard Savings is ...
(Date:12/19/2014)... PA (PRWEB) December 19, 2014 ... leading developer and manufacturer of needle-free injection technology, ... agreement with Immunomic Therapeutics, Inc. (“ITI”) for ITI ... device with its LAMP™ vaccine platform. , ... an exclusive Worldwide license to the Biojector®-2000 that ...
(Date:12/19/2014)... -- Roche (SIX: RO, ROG; OTCQX: RHHBY) announced today ... privately held company based in Redwood ... big data platform for centralized management and processing ... on-market Genomic Management Solution, Bina-GMS 1 , empowers ... and scalable analyses to maximize the value of ...
(Date:12/19/2014)... Springs, FL (PRWEB) December 18, 2014 ... of the nation’s leading specialty pharmacies, has an ... serve as clinical pharmacy consultants for prescriber offices ... therapy expertise. , “We have a variety ... therapies. For example, those specializing in hepatitis C ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 3Roche acquires Bina Technologies and enters the genomic informatics market 2Roche acquires Bina Technologies and enters the genomic informatics market 3BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 2BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 3
... NEW YORK, Oct. 16 Wall St. Network,s 3-Minute,Press ... Tracee Tolentino that,features in-depth interviews with public company executives ... show is designed to provide viewers with insight into ... growth., Shows air Monday through ...
... first-cycle,approval for a new molecular entity (NME) is ... average, according to a new analysis from,PAREXEL Consulting, ... PRXL ),and leading global life sciences consultancy serving ... PAREXEL Consulting,analysis, 60 percent of sales for newly-approved ...
... The future of how the world communicates, and ... from the same source: nanotechnology. According to a ... on Emerging Nanotechnologies (PEN), nanotechnology will be central ... "green" energy technologies. , In the latest ...
Cached Biology Technology:[video] Wall St. Network's 3-Minute Press Show Features Executive Interviews and Highlights Recent Press for the Following: IMMU, KYUS 2PAREXEL Consulting Quantifies Speed to Market: First-Cycle Approval for NME Produces $640 Million in Incremental Revenue on Average 2PAREXEL Consulting Quantifies Speed to Market: First-Cycle Approval for NME Produces $640 Million in Incremental Revenue on Average 3PAREXEL Consulting Quantifies Speed to Market: First-Cycle Approval for NME Produces $640 Million in Incremental Revenue on Average 4PAREXEL Consulting Quantifies Speed to Market: First-Cycle Approval for NME Produces $640 Million in Incremental Revenue on Average 5
(Date:12/11/2014)... Minn. , Dec. 10, 2014  Data ... physiologic monitoring, has released a new series of ... of preclinical toxicology researchers. M series, part of ... toxicologists collect the best possible physiologic data when ... Adding functional endpoints to toxicology studies has ...
(Date:12/10/2014)... N.C. , Dec. 9, 2014  Valencell, a ... it is seeing a staggering demand from its licensees ... the Company revealed, is not solely coming from fitness ... as well. "A wearable is only as ... result, accuracy is the ultimate driver in long-term mass ...
(Date:12/10/2014)... SAN DIEGO , Dec. 9, 2014 ... and collaboration catalyst that provides the connective tissue that ... by enabling them to easily share client-level information; earned ... Foundation to expand to organizations serving seniors aging in ... San Diego" partner on December 11 th 4-6p. ...
Breaking Biology News(10 mins):New telemetry implants expected to change how large animal toxicology studies are conducted 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4
... URBANA The University of Illinois scientists who ... cancer have developed a tool that will help them ... body. And they,ve secured funding from the National Institutes ... carotenoidsthe pigments that give the red, yellow, and orange ...
... the New York Academy of Sciences on December 9 ... science and policy initiatives addressing the global and national ... The Global Obesity Epidemic, is presented by the Academy ... with support from the new Sackler Institute for Nutrition ...
... work in protecting the lives and livelihoods of some of ... national award. At the Times Higher Education awards ceremony ... School of Planning, Architecture and Civil Engineering received the Outstanding ... recognises the team,s work in tackling the world,s worst case ...
Cached Biology News:U of I scientists develop tool to trace metabolism of cancer-fighting tomato compounds 2Super-sized world: Conference addresses global obesity epidemic, explores policies, interventions 2Queen's life-saving research wins education 'Oscar' 2
Protein YIPF6 (YIP1 family member 6). [Source:Uniprot/SWISSPROT;Acc:Q96EC8] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
Bovine Calf Serum...
... is designed to deparaffinize and perform Heat ... paraffin-embedded tissue sections mounted on glass microscope ... paraffin at the high temperature used in ... of the paraffin by detergent. Formaldehyde fixation ...
Chicken polyclonal to ytzF ( Abpromise for all tested applications). Antigen: Full length protein...
Biology Products: