Research leads to novel optofluidics platform of long optical path for robust chem/bio sensing

Jan 15, 2010

A research paper that has potential implications for homeland defense, work place safety, and health care has been published in the Journal of Advanced Materials.

Stevens Institute of Technology's Dr. Henry Du, Professor and Director of the Department of Chemical Engineering and Materials Science, together with Dr. Svetlana Sukhishvili, Professor of Chemistry and Co-Director of Stevens' Nanotechnology Graduate Program, supervised a research team consisting of Yun Han, Siliu Tan, Maung Kyaw Khaing Oo, and Denis Pristinski, and jointly authored the paper "Towards Full-Length Accumulative SERS-active Photonic Crystal Fiber."

The team has pioneered work in the integration of nanotechnology with photonic crystal fibers (PCF) for ultra-sensitive sensing and detection based on surface-enhanced Raman scattering (SERS). This paper stems from a major research project funded by the National Science Foundation that utilizes molecular and nanoscale surface modification, state-of-the-art techniques, and computer simulation for sensor development both from fundamental and applied standpoints.

The Stevens team has demonstrated that PCF optofluidic platform can be endowed the SERS capacity along the entire fiber, a first in the field. The team has shown the competitive interplay between SERS gain and light attenuation as the optical path length increases for PCF containing immobilized Ag , with low particle coverage density being essential for a net accumulative Raman gain throughout the fiber. Key to achieving the SERS-active PCF optofluidic platform lies in the high degree of control of nanoparticle coverage density via polyelectrolyte-based surface modification, which can be applied to PCF of unlimited fiber length.

SERS-active PCF optofluidic platform is inherently easy for system integration, robust in light coupling and harvesting, and unparalleled in optical path length for label-free and sensitive identification, according to Dr. Du. Its potential applications include fundamental studies of chemical, biological, and catalytic interactions in geometrically confined systems; chemical and biological sensing and detection; in situ process and health monitoring.

Explore further: New catalyst converts carbon dioxide to fuel

Provided by Stevens Institute of Technology

4 /5 (2 votes)
add to favorites email to friend print save as pdf

Related Stories

Photonic Crystal Fiber Nanosensors

Aug 22, 2004

Stevens Institute of Technology’s Dr. Henry Du and his research team have pioneered work on the integration of photonic crystal fibers (PCFs) with nanoscale technologies that will potentially lead to robust chemical and biological sensing devices. T ...

ORNL nanoprobe creates world of new possibilities

Jul 15, 2004

A technology with proven environmental, forensics and medical applications has received a shot in the arm because of an invention by researchers at the Department of Energy's Oak Ridge National Laboratory. ORNL's nanoprobe, which ...

Northwestern chemist investigates lost reds in Homer painting

Jun 11, 2008

More than 30 years ago, when Northwestern University chemist Richard Van Duyne developed a powerful new sensing technique, he never thought he would be using it to learn more about treasures in the Art Institute of Chicago's ...

Recommended for you

Nature inspires a greener way to make colorful plastics

10 hours ago

Long before humans figured out how to create colors, nature had already perfected the process—think stunning, bright butterfly wings of many different hues, for example. Now scientists are tapping into ...

New catalyst converts carbon dioxide to fuel

12 hours ago

Scientists from the University of Illinois at Chicago have synthesized a catalyst that improves their system for converting waste carbon dioxide into syngas, a precursor of gasoline and other energy-rich products, bringing ...

Building the ideal rest stop for protons

Jul 29, 2014

Where protons, or positive charges, decide to rest makes the difference between proceeding towards ammonia (NH3) production or not, according to scientists at Pacific Northwest National Laboratory (PNNL) and ...

Cagey material acts as alcohol factory

Jul 29, 2014

Some chemical conversions are harder than others. Refining natural gas into an easy-to-transport, easy-to-store liquid alcohol has so far been a logistic and economic challenge. But now, a new material, designed ...

User comments : 0