We utilized Raman spectroscopy to investigate H 2 O adsorption in and desorption from single-walled carbon nanotubes (SWCNTs). SWCNT tips were opened by known chemical methods and H 2 O was inserted into the tubes via capillary action over periods up to 136 h. The wavenumbers in the OH bending region of H 2 O increase almost exponentially with H 2 O treatment time. Following H 2 O adsorption for 136 h, Raman spectra were also measured as a function of heat-treatment temperature. These data lead to 0.07 eV for the H 2 O desorption energy from SWCNTs.

No abstract

No abstract

We measured Raman spectra for liquid methanol, ethanol, water and their mixture under ambient conditions. We also measured these spectra for wavenumbers in the range 1400-1600 cm −1 for methanol-ethanol (4 : 1) and methanol-ethanol-water (16 : 3 : 1) mixtures as functions of pressure up to 62 kbar at room temperature. We present results for the wavenumber, linewidth and relative intensity of the prominent bands as functions of pressure. These results should be useful for understanding the pressure (hydrostatic) dependence of the Raman spectra of solids.

No abstract