Instrument - Sullivan Lab Aerosol Optical Tweezers

Short name:

Full name:
Sullivan Lab Aerosol Optical Tweezers

What is being measured:
cavity-enhanced Raman spectrum of optically levitated single particles, particle size, particle morphology, refractive index

Sampling Protocol:



Instrument year :
None specified

Data recording software:

Data analysis software:

Raw data time resolution:
0.1-1 Hz

Analysis data averaging:

Detection limit:

Sensitivity to temperature (and correction method, if applicable): :

Sensitivity to relative humidity (and correction method, if applicable): :
relative humidity is controlled and measured but doesn't affect ability of the instrument to collect data

Sampling method:
liquid solution is atomized and a single droplet is trapped in a single-beam gradient force optical trap (532 nm)

Sample preparation method:

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):

Instrument flow rate:

Tubing inner diameter:

Tubing material:

Chemical identification method:
We identify chemicals based off their Raman shift.

Data analysis method:
We use a custom MATLAB algorithm to identify whispering gallery modes (WGMs) in the cavity-enhanced Raman spectrum, which give information about particle morphology, size, and refractive index.

Quantification method:
Raw signal is denoised and peak area is used for external calibration of concentration.

Calibration method:
Wavelength calibration is performed using a Princeton Instruments Ne/Ar light source and the IntelliCal algorithm built into the Lightfield software. Broad calibration is chosen to work over the entire spectral range.

Calibration drift estimate:

Calibration schedule:

Uncertainty estimation method:
Uncertainty arises from noise in the spectrum and is quantified using the custom MATLAB algorithm.

Known interferences:

Link to supplemental information:

Additional notes:
Please note that this instrument provides real-time data from optically levitated single droplets.

Measurement uncertainty:

Measurement units: