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.
Optical tweezers performance is investigated when the Gaussian beam is focused on the metal substrate with nanoparticle. When the beam is focused above the substrate optical force increases about an order of magnitude due to evanescent field of surface plasmon. Novel effect of repulsion from Gaussian beam (“anti-trapping”) is obtained when the beam waist is moved below the substrate which is confirmed...
This work shows preliminary results of the detection of Glyphosate in water by using optical fiber spectroscopy. A colloid with citrate-caped silver nanoparticles was employed as substrate for the measurements. A cross analysis between optical absorption and inelastic scattering evidenced a controlled aggregation of the sample constituents, leading to the possibility of quantitative detection of the...
The femtosecond laser sintering of metal nanoparticles was studied in order to fabricate submicron-sized metal patterns on flexible polymer substrates for various applications in the electronic and photonic industries. In this process, a mode-locked Ti:sapphire laser beam was tightly focused on silver nanoparticles. To achieve a homogeneous dispersion of the silver nanoparticles, the nanoparticles...
This article describes a fine line/space fabrication process on flexible polyimide film using laser direct writing method by photothermal effect of silver nanoparticles. Since the AgNPs have a strong optical absorption at 405 nm, a UV laser (405 nm, 60 mW) is used to trigger AgNPs to convert light into heat due to photothermal effect of nanoparticles. After UV laser beam irradiating on the AgNPs thin...
Selective removal of the silicon nitride dielectric layer has been demonstrated even using nanosecond range laser pulses, through carefully controlling the energy density of laser pulses. It has been found that, a laser pulse with a peak energy density of 4.3 J/cm2 or lower can remove the nitride layer without altering the underlying silicon while a pulse with a peak energy density of 4.8 J/cm2 or...
The purpose of this study is to develop a dry process for minute wiring or interconnections without any wet process such as chemical etching and electroplating. The process is based on the use of metal nanoparticles and their metallization by laser sintering, which will bring a desktop manufacturing of electronic circuits in view. The present paper investigates the influence of wavelength on laser...
We demonstrate SERS enhancement factor of order of 108 from Rhodamine-6G submonolayers on Ag island films treated by focused laser beam to create specific spatial particle size distribution predicted in Li-Stockman-Bergman model.
An amorphous alloy layer prepared by a laser-quenching technique was employed in the construction of a magnetostrictive torque sensor. Fe78B13Si9 amorphous alloy layers were produced on stainless steel substrates by laser-quenching. The laser-quenched layers consisted of a mainly amorphous phase, partially including regions crystallized under the influence of heat (heat-affected zones). VSM measurements...
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.