Advanced Techniques for Nanoparticle Measurement
Transcript of Advanced Techniques for Nanoparticle Measurement
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Advanced Techniques for Advanced Techniques for NanoparticleNanoparticle MeasurementMeasurement
Dr. Candace TsaiDr. Michael Ellenbecker
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Measure airborne nanoparticle
concentration
Collect airborne nanoparticle
samples
Release source- TSE
Particle Measurement Particle Measurement
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E2 E2
E3 E3
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EN EN
ChargerAirborne Particles In
Exhaust
Excess Flow
TSI Fast Mobility Particle Spectrometer (FMPS)• 5.6 to 560 nm, 32 channels, 1 second cycle time, 10L/min flow rate
Particle Concentration MeasurementParticle Concentration Measurement
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Data from FMPSData from FMPS-- Total ConcentrationTotal Concentration
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Data from FMPSData from FMPS-- size distributionsize distribution
Reference: Tsai et al. J. Nanoparticle Research, July 2008
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TSI Aerodynamic Particle Sizer Spectrometer (APS)• 0.5 to 20 μgm aerodynamic sizing
Particle Concentration MeasurementParticle Concentration Measurement
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Data from APS Data from APS
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Particle SamplingParticle Sampling
TEM grid (diameter 3.05 mm), copper, carbon tapes
Polycarbonate filter (diameter 45 mm)
Back up pad
Cassette base
Air stream
Pump
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TEM- PHILIPS EM400TSEM- JEOL JSM-1401F FE-SEM
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Airborne Airborne NanoparticlesNanoparticles
Nanoalumina particle Nanoalumina particle
Avg. size: 45 nmAvg. size: 45 nm
Avg. bAvg. bulk density: 260 kg/m3
Nanoalumina
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TEM imagesTEM images• Conventional hood, Particles on TEM grid
20 nm
80 nm
100 nm
BZ Source
Nanoalumina Aerosols
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SEM imagesSEM images
• Nanosilver and cluster of fullerene
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SEM image and EDS of SEM image and EDS of nanoaluminananoalumina
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Smoke Test for Airflow PatternSmoke Test for Airflow Pattern
• Fog machine- Generate smoke for tests.
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Smoke TestSmoke Test
• Conventional hood AirAir--curtain hoodcurtain hood
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Aerosol particles from 5 nm to 20Aerosol particles from 5 nm to 20μμμμμμμμmm