Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New technique to detect and manipulate nano-objects using plasmonic nano-cavities

OpticalTrapping: SIBA plasmonic trapping using a Fabry–Pérot nanopore cavity
OpticalTrapping: SIBA plasmonic trapping using a Fabry–Pérot nanopore cavity

Abstract:
Imec researchers have presented a new approach to detect and manipulate nano-objects. The technique makes use of plasmonic excitation in nanocavities. In a demonstration, a rectangular nanocavity was used to detect the presence of 22nm beads. This approach may open new routes to create optical tweezers at the nanoscale, for ultra-accurate sensing, trapping, and arranging of nanoscale objects, such as biomolecules (e.g. proteins or DNA).

New technique to detect and manipulate nano-objects using plasmonic nano-cavities

Leuven, Belgium | Posted on March 16th, 2012

Optical trapping techniques, the so called optical tweezers, are used to trap and manipulate objects. A highly focused laser beam provides an attractive or repulsive force to physically hold and move microscopic dielectric objects (down to micrometer-scale). But this technique cannot be applied straightforward to nanoscale objects. The energy required to manipulate such small objects is simply too large in relation to their size and would destroy the objects. Recently, researchers have therefore come up with the idea to make use of the strong local fields of metal nanostructures that are excited by light.

When metal nanostructures are illuminated with visible to near-infrared light, strong local electromagnetic fields are generated. These are caused by the collective oscillations of conduction electrons - called surface plasmons. These fields can be detected and visualized e.g. through surface-enhanced Raman spectroscopy. And because the presence of nanosized objects, such as biomulecules, causes changes in the fields, this phenomenon can be used as a sensor.

But the energy of the local fields could also be used to trap and manipulate the nanosized objects. In a recent publication, imec's researchers now present a new approach that uses this technique. They combine self-induced back action (SIBA) trapping with the latest advances in nanoscale plasmon engineering.

As a demonstration, the researchers designed a resonant trap in the form of a rectangular nanopore. This form of pore allows for tuning the plamons by changing the aspect ratio. This trap was successfully tested with 22nm polystyrene beads, distinguishing between events where one bead was trapped, or those where two beads were trapped at the same time. As part of their work, the researchers also proposed a figure of merit to quantify the efficiency of their trapping mechanism and to compare it to other optical nanotweezers.

####

For more information, please click here

Contacts:
Barbara Kalkis
Maestro Marketing & PR

Copyright © IMEC

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

This work was published in the January edition of Nano-letters:

Related News Press

News and information

Chains of nanogold – forged with atomic precision September 23rd, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Nanotech Grants Options September 22nd, 2016

Coffee-infused foam removes lead from contaminated water September 21st, 2016

Sensors

Chains of nanogold – forged with atomic precision September 23rd, 2016

Speedy bacteria detector could help prevent foodborne illnesses September 21st, 2016

NIST Patents Single-Photon Detector for Potential Encryption and Sensing Apps September 16th, 2016

Notre Dame researchers find transition point in semiconductor nanomaterials September 6th, 2016

Discoveries

Chains of nanogold – forged with atomic precision September 23rd, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Speedy bacteria detector could help prevent foodborne illnesses September 21st, 2016

Coffee-infused foam removes lead from contaminated water September 21st, 2016

Announcements

Chains of nanogold – forged with atomic precision September 23rd, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Nanotech Grants Options September 22nd, 2016

Coffee-infused foam removes lead from contaminated water September 21st, 2016

Tools

Oxford Instruments is ‘Bringing the Nanoworld Together’ in India once again - 22 - 23 November 2016 | IISc Bangalore September 21st, 2016

Bruker Introduces Complete Commercial AFM-Based SECM Solution: PeakForce SECM Mode Enables Previously Unobtainable Electrochemical Information September 20th, 2016

Oxford Instruments Asylum Research Announces New SurfRider Econo Board Probes for Routine AFM Measurements September 19th, 2016

Electron beam microscope directly writes nanoscale features in liquid with metal ink September 16th, 2016

Alliances/Trade associations/Partnerships/Distributorships

PHENOMEN is a FET-Open Research Project aiming to lay the foundations a new information technology September 19th, 2016

SEMI and MSIG Join Together in Strategic Association Partnership: MEMS & Sensors Industry Group Brings New MEMS and Sensors Community to SEMI to Increase Combined Member Value September 15th, 2016

Leti and Oberthur Technologies Partner to Explore New Solutions in Fast-growing Digital Era September 12th, 2016

Synopsys Joins GLOBALFOUNDRIES’ FDXcelerator Partner Program to Enable Innovative Designs Using the FD-SOI Process: Program Gives Synopsys Access to GLOBALFOUNDRIES’ FDX Portfolio and Provides Customers with Tools that Support the Differentiated Features of FD-SOI September 8th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic