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(a) Absorption coefficients of TE buffer and these four oligonucleotide solutions at 0.6–1.4 THz. The inset shows the amplified spectra at a narrow frequency band of 0.87–0.92 THz to highlight the error bars and the frequency resolution clearly; (b) Absorption coefficients of these samples at 0.6, 0.8, 1.0, 1.2 and 1.4THz, respectively.
