Amazines Free Article Archive - Thursday, January 23, 2020
Read about the most recent changes and happenings at
Log into your account or register as a new author. Start submitting your articles right now!
Search our database for articles.
Subscribe to receive articles emailed straight to your email account. You may choose multiple categories.
View our newest articles submitted by our authors.
View our most top rated articles rated by our visitors.
* Please note that this is NOT the ARTICLE manager
Add a new EZINE, or manage your EZINE submission.
Add fresh, free web content to your site such as newest articles, web tools, and quotes with a single piece of code!
Home What's New? Submit/Manage Articles Latest Posts Top Rated Article Search
Subscriptions Manage Ezines
 Article Archive
 Advertising (133326)
 Advice (160998)
 Affiliate Programs (34736)
 Art and Culture (73698)
 Automotive (145681)
 Blogs (75065)
 Boating (9841)
 Books (17218)
 Buddhism (4125)
 Business (1328653)
 Business News (426321)
 Business Opportunities (366271)
 Camping (10962)
 Career (72737)
 Christianity (15846)
 Collecting (11637)
 Communication (115053)
 Computers (241955)
 Construction (38999)
 Consumer (49681)
 Cooking (17061)
 Copywriting (6568)
 Crafts (18205)
 Cuisine (7539)
 Current Affairs (20394)
 Dating (45782)
 EBooks (19687)
 E-Commerce (48205)
 Education (185262)
 Electronics (83503)
 Email (6395)
 Entertainment (159843)
 Environment (28938)
 Ezine (3039)
 Ezine Publishing (5446)
 Ezine Sites (1550)
 Family & Parenting (110901)
 Fashion & Cosmetics (196391)
 Female Entrepreneurs (11842)
 Feng Shui (130)
 Finance & Investment (310291)
 Fitness (106205)
 Food & Beverages (62874)
 Free Web Resources (7938)
 Gambling (30229)
 Gardening (25112)
 Government (10514)
 Health (629628)
 Hinduism (2205)
 Hobbies (44046)
 Home Business (91561)
 Home Improvement (251375)
 Home Repair (46146)
 Humor (4825)
 Import - Export (5453)
 Insurance (45130)
 Interior Design (29560)
 International Property (3485)
 Internet (190991)
 Internet Marketing (146346)
 Investment (22826)
 Islam (1167)
 Judaism (1356)
 Law (80519)
 Link Popularity (4592)
 Manufacturing (20842)
 Marketing (98791)
 MLM (14136)
 Motivation (18213)
 Music (27005)
 New to the Internet (9480)
 Non-Profit Organizations (4048)
 Online Shopping (129617)
 Organizing (7803)
 Party Ideas (11856)
 Pets (38079)
 Poetry (2234)
 Press Release (12676)
 Public Speaking (5618)
 Publishing (7523)
 Quotes (2407)
 Real Estate (126633)
 Recreation & Leisure (95293)
 Relationships (87564)
 Research (16159)
 Sales (80325)
 Science & Technology (110227)
 Search Engines (23462)
 Self Improvement (153103)
 Seniors (6233)
 Sexuality (35943)
 Small Business (49288)
 Software (82996)
 Spiritual (23468)
 Sports (116087)
 Tax (7658)
 Telecommuting (34068)
 Travel & Tourism (307501)
 UK Property Investment (3121)
 Video Games (13428)
 Web Traffic (11728)
 Website Design (56833)
 Website Promotion (36574)
 World News (1000+)
 Writing (35776)
Author Spotlight

Jim Turner is a USA based author of Legal issues related to estate planning, will & trust , busyness...more

Financial analyst and author writing on economy and business. ...more

Shovon Joarder has been working as Freelance Marketing Project Manager for over four years. He also ...more

I have been involved in nutrition and weight management for over 12 years and I like to share my kn...more

My Name is Anish Sah, I am an Internet Marketing and SEO Expert, Social Media Guru and young Entrepr...more

Tighter 'stitching' means better graphene, scientists say - Miners Lamp Manufacturer by fdhjkl rfghjtkl

Article Author Biography
Tighter 'stitching' means better graphene, scientists say - Miners Lamp Manufacturer by
Article Posted: 12/13/2012
Article Views: 48
Articles Written: 2148
Word Count: 640
Article Votes: 0
AddThis Social Bookmark Button

Tighter 'stitching' means better graphene, scientists say - Miners Lamp Manufacturer

Business,Business News,Business Opportunities
Posted: May 31st, 2012 Tighter 'stitching' means better graphene, scientists say ( Nanowerk News ) Similar to how tighter stiches make for a better quality quilt,the "stitching" between individual crystals of graphene affects howwell these carbon monolayers conduct electricity and retain theirstrength, Cornell researchers report. The quality of this "stitching" -- the boundaries at which graphenecrystals grow together and form sheets -- is just as important asthe size of the crystals themselves, which scientists hadpreviously thought held the key to making better graphene. The researchers, led by Jiwoong Park, assistant professor ofchemistry and chemical biology and a member of the Kavli Instituteat Cornell for Nanoscale Science, used advanced measurement andimaging techniques to make these claims, detailed online in thejournal Science June 1 ( "Tailoring Electrical Transport Across Grain Boundaries inPolycrystalline Graphene" ). False-color microscopy images show examples of graphene grownslowly, resulting in large patches with poor stitching, andgraphene grown more quickly, resulting in smaller patches withtighter stitching and better performance. (Image: Muller lab) Graphene is a single layer of carbon atoms, and materialsscientists are engaged in a sort of arms race to manipulate andenhance its amazing properties -- tensile strength, high electricalconductance, and potential applications in photonics, photovoltaicsand electronics.

Cartoons depict graphene like a perfect atomicchicken wire stretching ad infinitum. In reality, graphene is polycrystalline; it is grown via a processcalled chemical vapor deposition, in which small crystals, orgrains, at random orientations grow by themselves and eventuallyjoin together in carbon-carbon bonds. In earlier work published in Nature last January ( "Grains and grain boundaries in single-layer graphene atomicpatchwork quilts" ), the Cornell group had used electron microscopy to liken thesegraphene sheets to patchwork quilts -- each "patch" represented bythe orientation of the graphene grains (and false colored to makethem pretty). They, along with other scientists, wondered how graphene'selectrical properties would hold up based on its polycrystallinenature. Conventional wisdom and some prior indirect measurementshad led scientists to surmise that growing graphene with largercrystals -- fewer patches -- might improve its properties.

The new work questions that dogma. The group compared how grapheneperformed based on different rates of growth via chemical vapordeposition; some they grew more slowly, and others, very quickly.They found that the more reactive, quick-growth graphene, with morepatches, in certain ways performed better electronically than theslower growth graphene with larger patches. A scanning electron microscope (SEM) image of graphene crystalsgrowing on copper. The inset is a false-color SEM image of anelectrical device consisting of a single grain boundary ingraphene.

(Image: Wei Tsen/Park lab) As it turned out, faster growth led to tighter stitching betweengrains, which improved the graphene's performance, as opposed tolarger grains that were more loosely held together. "What's important here is that we need to promote the growthenvironment so that the grains stitch together well," Park said."What we are showing is that grain boundaries were a main concern,but it could be that it doesn't matter. We are finding that it'sprobably OK." Equal in importance to these observations were the complextechniques they used to make the measurements -- no easy task. Afour-step electron beam lithography process, developed by AdamTsen, an applied physics graduate student and the paper's firstauthor, allowed the researchers to place electrodes on graphene,directly on top of a 10 nanometer-thick membrane substrate tomeasure electrical properties of single grain boundaries.

"Our technique sets a tone for how we can measure atomically thinmaterials in the future," Park added. Collaborators led by David A. Muller, professor of applied andengineering physics and co-director of the Kavli Institute atCornell for Nanoscale Science, used advanced transmission electronmicroscopy techniques to help Park's group image their graphene toshow the differences in the grain sizes.

We are high quality suppliers, our products such as Miners Lamp Manufacturer , Electric Light Fixture for oversee buyer. To know more, please visits LED Halogen Lights.

Related Articles - Miners Lamp Manufacturer, Electric Light Fixture,

Email this Article to a Friend!

Receive Articles like this one direct to your email box!
Subscribe for free today!

 Rate This Article  
Completely useless, should be removed from directory.
Minimal useful information.
Decent and informative.
Great article, very informative and helpful.
A 'Must Read'.


Do you Agree or Disagree? Have a Comment? POST IT!

 Reader Opinions 
Submit your comments and they will be posted here.
Make this comment or to the Author only:
*Your email will NOT be posted. This is for administrative purposes only.
Comments: *Your Comments WILL be posted to the AUTHOR ONLY if you select PRIVATE and to this PUBLIC PAGE if you select PUBLIC, so write accordingly.
Please enter the code in the image:

 Author Login 
Register for Author Account


Advertiser Login


   Limited Time $60 Offer!
   90  Days-1.5 Million Views  


Great Paranormal Romance


At LeadGenerators, we specialise in content-led Online Marketing Strategies for our clients in the t...more

Author of four books and two screenplays; frequent magazine contributor. I have four other books "in...more

Steve Bye is currently a fiction writer, who published his first novel, ‘Looking Forward Through The...more

Stevert Mckenzie, Travel Enthusiast. ...more

Susan Friesen, founder of the award-winning web development and digital marketing firm eVision Media...more

Rev Bresciani is the author of two Christian books. One book is an important and concisely written b...more

I am not a writer nor am I trying to become a writer. I am an average person with average intelligen...more

Kiranpreet (Kiran) Kaur, D.D.S., who received her Doctor of Dental Surgery degree from the prestigio...more

Steve Burgess is a freelance technology writer, a practicing computer forensics specialist as the pr...more

Joanna Morgan has a huge passion for making money online from home and enjoys traveling around the w...more

HomeLinksAbout UsContact UsTerms of UsePrivacy PolicyFAQResources
Copyright © 2020, All rights reserved.
Some pages may contain portions of text relating to certain topics obtained from under the GNU FDL license