Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microfluidic lab-on-a-chip characterization of nano- to microparticles
  suspensions by light extinction spectrometry   The analysis of nano-and microparticle suspensions with micro systems affords
improved space-time yields, selectivity, reaction residence times and
conversions capabilities. These capabilities are of primary importance in
various fields of research and industry. The few microfluidic lab-on-a-chip
approaches that have been developed are essentially designed to analyse fluid
phases or involve the use of benchtop particle sizing instruments. We report a
novel microscale approach to characterize the particle size distribution and
absolute concentration of colloidal suspensions. The method is based on a
photonic lab-on-a-chip with three scale-specific detection channels to record
simultaneous light extinction spectra. Experiments carried out on particle
standards with sizes ranging from 30 nm to 0.5 $\mu$m and volume concentrations
of 1 to 1000ppm, clearly demonstrate the value and potential of the proposed
method.

10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an