# Surface Plasmon Resonance-Based Fiber Optic Sensors Utilizing Molecular Imprinting
## 7 Summary and Outlook
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Analyte**} & **Functional** & \multirow{2}{*}{**Fiber Configuration**} & **Operating Range** & **Sensitivity** & \multirow{2}{*}{**LOD (M)**} & **Ref.** \\ \cline{3-3} \cline{5-6}  & **Monomer** & & & & & \\ \hline \multirow{3}{*}{TNT} & MAA & Flat core/Au/MIP & 0-\(2.5\times 10^{-4}\) & \(2.7\times 10^{4}\) & \(5.1\times 10^{-5}\) & [152] \\ \cline{2-6}  & MAA & Flat core/Au nanostar + MIP & 0-\(2.5\times 10^{-4}\) & \(8.4\times 10^{4}\) & \(2.4\times 10^{-6}\) & [153] \\ \hline \multirow{3}{*}{TC} & AM & Flat core/Ag/MIP hydrogel & 0-\(9.6\times 10^{-7}\) & \(4.21\times 10^{8}\) & - & [157] \\ \cline{2-6}  & AM &
\begin{tabular}{c} Flat core/Ag/Ag Np/ \\ MIP hydrogel \\ \end{tabular} & \(10^{-8}\)–\(10^{-5}\) & \(1.5\times 10^{8}\) & \(2.2\times 10^{-9}\) & [65] \\ \hline OTC & AM & Flat core/Ag/MIP hydrogel & 0-\(9.6\times 10^{-7}\) & \(1.12\times 10^{8}\) & - & [157] \\ \hline Vitamin B\({}_{3}\) & AM & Flat core/Ag/CCr-MIP & 0-0.081 & 182.557 & - & [159] \\ \hline Vitamin B\({}_{2}\) & AM & Flat core/Ag/CCr-MIP & 0-\(8.5\times 10^{-4}\) & \(1.28\times 10^{4}\) & & [160] \\ \hline \multirow{3}{*}{L-Nicotine} & MAA & Tapered core/Au/MIP & 0-\(10^{-3}\) & \(1.3\times 10^{4}\) & \(1.86\times 10^{-4}\) & [161] \\ \cline{2-6}  & MAA & Flat core/Ag/MIP & \(10^{-7}\)–\(10^{-1}\) & \(10.1\times 10^{7}\) & \(9.87\times 10^{-9}\) & [164] \\ \cline{2-6}  & MAA & Flat core/Ag/Si/MIP & \(10^{-8}\)–\(10^{-1}\) & \(76.0\times 10^{8}\) & \(4.3\times 10^{-11}\) & [165] \\ \hline \multirow{3}{*}{Ascorbic acid} & Aniline & Flat core/Ag/PANNI-MIP & \(10^{-8}\)–\(10^{-4}\) & \(26.384\times 10^{8}\) & \(1.28\times 10^{-10}\) & [166] \\ \cline{2-6}  & Aniline & Flat core/Ag/PANNI-Ag MIP & \(10^{-8}\)–\(10^{-4}\) & \(45.1\times 10^{8}\) & \(7.38\times 10^{-11}\) & [66] \\ \hline Profenofos & MAA & Flat core/Ag/MIP & \(2.68\times(10^{-7}\)–\(10^{-4})\) & \(4.75\times 10^{7}\) & \(6.69\times 10^{-9}\) & [144] \\ \hline Atrazine & MAA/ & Flat core/Ag/MIP & \(10^{-12}\)–\(10^{-7}\) & \(17.34\times 10^{12}\) & \(1.92\times 10^{-14}\) & [47] \\ \hline ERY & MAA & Flat core/Ag/MIP NPs & \(0\)–\(5\times 10^{-5}\) & \(5.32\times 10^{6}\) & \(6.2\times 10^{-8}\) & [179] \\ \hline \hline \end{tabular}  
* The following are the abbreviations and expansions used in Table 3: TNT—trinitrotoluene, MAA—methacrylic acid, TC—tetracycline, OTC—oxytetracycline, AM—acrylamide, CCr—colloidal crystal, PANI—polyaniline, HEMA—2-hydroxyl methacrylate, ERY—erythromycin.  
\end{table} 
Table 3: Performance parameters of various SPR/LSPR and MIP techniques based fiber optic sensors. * (1) [PERSON] _Surface Plasmon Resonance Based Sensors_; Springer-Verlag: Berlin, Germany; Heidelberg, Germany, 2006. * (2) [PERSON] _Fiber Optic Sensors: Principles and Applications_; NIPA: New Delhi, India, 2006. * (3) [PERSON]; [PERSON]; [PERSON] Classification of fiber optical sensors. _Int. J. Electron. Commun. Comput. Technol._**2013**, 3, 442-445. * (4) [PERSON]; [PERSON]; [PERSON] _Fiber Optic Sensors Based on Plasmonics_; World Scientific Publishing Company: Singapore, 2015. * (5) [PERSON] _Handbook of Optical Fiber Sensor Technology_; John Wiley & Sons: London, UK, 2002. * (6) [PERSON] _Reviews in Plasmonics 2010_; Springer Science + Business Media, LLC: New York, NY, USA, 2011; pp. 105-137. * (7) [PERSON]; [PERSON]; [PERSON]. _Fiber Optic Sensors, Second Edition_; CRC Press, LLC: Boca Raton, FL, USA, 2008; pp. 397-434. * (8) [PERSON]; [PERSON] Surface plasmon resonance based fiber optic refractive index sensor utilizing silicon layer: Effect of doping. _Opt. Commun._**2013**, _286_, 171-175. [CrossRef]
* (9) [PERSON]; [PERSON]; [PERSON] Sensitivity enhancement of a surface plasmon resonance based fiber optic refractive index sensor utilizing an additional layer of oxides. _Sens. Actuators A Phys._**2013**, _193_, 136-140. [CrossRef]
* (10) [PERSON]; [PERSON]; [PERSON] Sensitivity enhancement of surface plasmon resonance based fiber optic refractive index sensor using an additional layer of zinc oxide.