\begin{table}%t1
%\centering
\par
\caption{Infrared band spectral characteristics and assignments as extracted from the soot material samples. The band centres and widths are the mean values found for all the Gaussian fits (see text). The uncertainties are given in parentheses and include the dispersion of the band characteristics. The modes reported here are all stretching (str.) modes.}\label{Bands}
 \small \begin{tabular}{lccc}
\hline  \hline\noalign{\smallskip}
Assignment &  Wavelength ($\mu$m) & Wavenumbers (cm$^{-1}$)& Bandwidth (cm$^{-1}$)\\
\hline
Alkyne CH str. &  3.040 (0.01) & 3289 (10)  & 39 (10)\\
Olefinic asym. CH$_{2}$ str. &  3.24 (0.005) & 3089 (4)  & 25 (5)\\
Aromatic CH str. &  3.29 (0.005) & 3039 (4)  & 49 (10)\\
Olefinic CH and CH$_{2}$ sym. str. & 3.35 (0.01) & 2981 (10) & 25 (7)\\
Aliphatic asym. CH$_{3}$ str. &  3.38 (0.006) &  2956 (5) & 23 (7)\\
Aliphatic asym. CH$_{2}$ str. &  3.42 (0.006) & 2923 (5) & 25 (10)\\
Aliphatic CH str. \\
or  aliphatic asym. CH$_{2}$ str. Fermi resonance &  3.45 (0.012) &2894 (10) & 25 (10)\\
Aliphatic sym. CH$_{3}$ str. &   3.48 (0.006) &  2869 (5) & 16 (3)\\
Aliphatic sym. CH$_{2}$ str. &  3.51 (0.006)  &  2850 (5) & 13 (3)\\
&  3.53 (0.006) &  2834 (10) & 29 (15)\\
sp2-C=C str. &  6.25 (0.1) & 1600 (25) & 45 (20)\\
\hline
\end{tabular}
\end{table}