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NAMSR News: New sensor developed to detect tiny individual nanoparticles

Nanoparticles may be able to count and identify individual viruses

 
ARLINGTON, Va. - Sept. 4, 2014 - PRLog -- Nanoparticles, engineered materials about a billionth of a meter in size, are around us every day. Although they are tiny, they can benefit human health, as in some innovative early cancer treatments, but they can also interfere with it through viruses, air pollution, traffic emissions, cosmetics, sunscreen and electronics.

A team of researchers at Washington University in St. Louis, led by Lan Yang, PhD, the Das Family Career Development Associate Professor in Electrical & Systems Engineering, and their collaborators at Tsinghua University in China have developed a new sensor that can detect and count nanoparticles, at sizes as small as 10 nanometers, one at a time. The researchers say the sensor could potentially detect much smaller particles, viruses and small molecules.

Yang and her colleagues have created the Raman micro laser sensor in a silicon dioxide chip to find individual nanoparticles without the need to "dope" the chip with chemicals called rare-earth ions to provide optical gain for the micro laser. Incorporating additions to the micro resonator creates the need for more processing steps and increased costs and invites biocompatibility risks. In addition, the use of rare-earth ions requires specific "pump" lasers matching the energy transitions of the ions to generate optical gain, so for different rare-earth ions, different pump lasers must be used.

Yang's team integrated Raman lasing in a silica micro cavity with the mode splitting technique pioneered by her group to develop a new, powerful sensor that more readily detects nanoparticles. The technology will benefit the electronics, acoustics, biomedical, plasmonics, security and meta materials fields.

Yang's micro sensor is in a class called whispering gallery mode resonators (WGMRs) because it works similarly to the renowned whispering gallery in London's St. Paul's Cathedral, where a person on one side of the dome can hear a message spoken to the wall by another person on the other side. Yang's device does much the same thing with light frequencies rather than audible ones.

In addition to the demonstration of Raman micro lasers for particle sensing, the team says their work shows the possibility of using intrinsic gain mechanisms, such as Raman and parametric gain, instead of optical dyes, rare-earth ions or quantum dots, for loss compensation in optical and plasmonic systems where dissipation hinders progress and limits applications.

CANDIDATES WHO WANT TO BREAK INTO MEDICAL SALES:

RMSR® Medical Sales Certification offered by the National Association of Medical Sales Representatives is designed for entry level medical device sales reps. The course covers a wide array of topics pertaining to industry knowledge that candidates need to acquire before applying to medical sales positions.

The course and training helps to develop the industry skills, maximizing the candidates’ potential and goals, as well as making them feel valued and stimulated in their role when communicating with members of the medical community. By an applicant acquiring medical sales training and a RMSR Certification, it puts him/her in a position of strength and qualifies them for medical sales jobs. Medical knowledge is key in this industry and when communicating with doctors, surgeons, and nurses etc.

It is extremely important for representatives to use key terminology pertaining to the medical product he/she will be promoting. The only way to succeed in this industry is to garner actual sales. Doctors and Surgeons will not acknowledge a Sales Rep who is not proficient in essential medical terminology, knowledgeable of medical devices/equipment and the anatomy. For those lacking a solid sales background the RMSR course covers knowledge of medical selling techniques and regulation such as Effective Territory Management, Effective Networking, Medical Sales Ethical & Regulatory Guidelines and more.

The National Association of Medical Sales Representative™ (NAMSR) is the largest professional association in the world for Medical Sales Representatives. Through our numerous members, the NAMSR™ provides accredited training, continuing education, information about the industry, up-to-date news, programs to assist medical sales reps in their work, training programs to assist candidates who want to break into the industry and initiatives to improve communication with the medical sales field.

For more information on the NAMSR or the RMSR certification visit www.medicalsalescareer.com or call 800-313-9198


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