The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The analysis of petrochemical samples by Terahertz (THz) spectroscopy is investigated. THz spectroscopy is a nondestructive, contact-free analysis method for the study of many different materials. In this work, we show that the THz spectra can be used to get different chemical and structural information from a potential hydrocarbon source. Density of the geological samples has the potential for valuable...
The shape of bands in surface-enhanced infrared spectra of molecules near the surface of metal nanoparticles is shown to depend on whether or not the nanoparticles have exceeded the percolation threshold. If the nanoparticles are in the form of independent metal islands, the absorption bands of molecules within 5nm of the surface are symmetrical. Immediately after the percolation threshold has been...
The absorbance of bands in the infrared spectrum of species located within 5nm of the surface of metal nanoparticles deposited on dielectric substrates is known to be increased by between one and three orders of magnitude through the phenomenon known as surface-enhanced infrared absorption (SEIRA). The mechanism of SEIRA is still not fully understood. For example, under certain circumstances, the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.