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ON-LINE DETERMINATION OF SINGLE PARTICLE SIZE AND DENSITY IN THE 5 - 100NM…

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
14259
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
14259
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Aerosol Dynamics Inc.
935 Grayson Street Berkeley, CA 94710-2640
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: ON-LINE DETERMINATION OF SINGLE PARTICLE SIZE AND DENSITY IN THE 5 - 100NM DIAMETER RANGE
Agency: NSF
Contract: N/A
Award Amount: $49,852.00
 

Abstract:

PROPOSED HERE IS A DIAGNOSTIC METHOD FOR THE ON-LINE, SEMI-CONTINUOUS DETERMINATION OF THE SIZE AND DENSITY (G/CM(3)) OF INDIVIDUAL PARTICLES IN THE 5 NM TO 100 NM SIZERANGE. THIS IS ACCOMPLISHED THROUGH A DOUBLE SIZE SPECTROMETRY SYSTEM. PARTICLES ARE FIRST SIZED BY THEIR STOKES DIAMETER, AND THEN SIZED BY THEIR AERODYNAMIC DIAMETER. THE FIRST MEASURE, NAMELY THE STOKES DIAMETER SIZING, GIVES THE GEOMETRIC DIAMETER OF THE PARTICLE FOR ROUND PARTICLES. THE SECOND MEASURE, THE AERODYNAMIC SIZING, IS DEPENDENT ON PARTICLE DENSITY AS WELL AS STOKES DIAMETER. THE RESULT IS A DISTRIBUTION OF PARTICLE DENSITIES AT EACH SELECTED STOKES DIAMETER. THE STOKES SIZING IS DONE BY AN ELECTRICAL MOBILITY SEPARATION, THE AERODYNAMIC SIZING IS DONE USING A SINGLE-STAGE HYPERSONIC IMPACTOR. THE ELECTRICAL MOBILITY SPEARATION PRODUCES MONODISPERSE PARTICLES OF KNOWN STOKES SIZE WHICH ARE SAMPLED BY THE IMPACTOR. THE AERODYNAMIC SIZE FOR PARTICLE CAPTURE IS VARIED BY ADJUSTMENT OF THE IMPACTION PLATE POSITION. SINCE PARTICLES ARE SINGLY CHARGED, THE RATE OF PARTICLE CAPTURE IN CAN BE MEASURED ON-LINE USING AN ELECTROMETER. THE SYSTEM IS EFFECTIVE OVER THE 5 TO 100 NM DIAMETER RANGE.

Principal Investigator:

Susanne V. Hering
President
0

Business Contact:

Small Business Information at Submission:

Aerosol Dynamics
2811 Wilshire Blvd Suite 790 Santa Monica, CA 90403

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No