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Quantifying nanosheet graphene oxide using electrospray-differential mobility analysis.

Jui-Ting Tai1, Yen-Chih Lai1,2, Jian-He Yang1

  • 1†Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China.

Analytical Chemistry
|March 19, 2015
PubMed
Summary
This summary is machine-generated.

Quantify nanosheet graphene oxide (N-GO) colloids using electrospray-differential mobility analysis (ES-DMA). This method accurately measures N-GO size and concentration, aiding in colloidal stability and filtration assessments.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Nanosheet graphene oxide (N-GO) is a crucial nanomaterial with diverse applications.
  • Accurate characterization of N-GO size and concentration is essential for its effective utilization.
  • Existing methods may lack the resolution or traceability required for precise quantification.

Purpose of the Study:

  • To develop and validate a high-resolution, traceable method for quantifying N-GO colloids.
  • To assess the suitability of electrospray-differential mobility analysis (ES-DMA) for N-GO characterization.
  • To establish a foundation for reliable N-GO formulation and application.

Main Methods:

  • Utilized electrospray-differential mobility analysis (ES-DMA) for high-resolution sizing and counting of N-GOs.
  • Employed transmission electron microscopy (TEM) for orthogonal validation and imaging.
  • Applied an analytical model to convert mobility size data to lateral size distributions.

Main Results:

  • ES-DMA successfully measured equivalent mobility sizes, size distributions, and number concentrations of N-GOs.
  • Colloidal stability and filtration efficiency were effectively characterized by monitoring size and concentration changes.
  • Analytical modeling yielded an average N-GO lateral size of ~32 nm and a thickness of ~0.8 nm.

Conclusions:

  • ES-DMA provides a viable, traceable method for quantitative characterization of N-GO colloids.
  • This technique enables precise assessment of N-GO properties crucial for stability and filtration.
  • The study demonstrates proof of concept for ES-DMA in N-GO formulation and application development.