TY - JOUR
T1 - Screening of single-walled carbon nanotubes by optical fiber sensing
AU - Justino, Celine I.L.
AU - Freitas, Ana C.
AU - Rocha-Santos, Teresa A. P.
AU - Duarte, Armando C.
PY - 2012/1/30
Y1 - 2012/1/30
N2 - A methodology based on optical fiber (OF) sensing was developed to screen single walled carbon nanotubes (SWCNT) in aqueous solutions. This method was validated by the comparison of its analytical performance with that of an ultraviolet-visible (UV-Vis) technique by monitoring the absorbance intensities at 500 nm, and no significant difference (p = 0.854) was observed between such two methods. The results obtained by the OF sensor were encouraging in what concerns a new approach for detection and quantification of SWCNT in solutions due to its compact design, less expensive materials and equipment, as well as a requirement of low volume of sample. Additionally, it was concluded that the nonlinear calibration model observed for the analytical response with the OF probe follows the general cumulative symmetric double sigmoidal (SDS) model (R2 = 0.9999), once adapted for the analytical region of interest.
AB - A methodology based on optical fiber (OF) sensing was developed to screen single walled carbon nanotubes (SWCNT) in aqueous solutions. This method was validated by the comparison of its analytical performance with that of an ultraviolet-visible (UV-Vis) technique by monitoring the absorbance intensities at 500 nm, and no significant difference (p = 0.854) was observed between such two methods. The results obtained by the OF sensor were encouraging in what concerns a new approach for detection and quantification of SWCNT in solutions due to its compact design, less expensive materials and equipment, as well as a requirement of low volume of sample. Additionally, it was concluded that the nonlinear calibration model observed for the analytical response with the OF probe follows the general cumulative symmetric double sigmoidal (SDS) model (R2 = 0.9999), once adapted for the analytical region of interest.
KW - Experimental design
KW - Optical fiber sensor
KW - SDS calibration model
KW - Single-walled carbon nanotubes
KW - UV-Vis spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84856354252&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2011.11.074
DO - 10.1016/j.talanta.2011.11.074
M3 - Article
AN - SCOPUS:84856354252
SN - 0039-9140
VL - 89
SP - 105
EP - 108
JO - Talanta
JF - Talanta
ER -