Raman Spectroscopy

Masjed daghi ore is located within the magmatic-metallogenic zone of Arasbaran and within the division of structural zones in Iran in Alborz-Azerbaijan zone.The vastest rocks in mineralization area are andesite to trachyandesite. There are latite tuff, agglomerate andes More

Masjed daghi ore is located within the magmatic-metallogenic zone of Arasbaran and within the division of structural zones in Iran in Alborz-Azerbaijan zone.The vastest rocks in mineralization area are andesite to trachyandesite. There are latite tuff, agglomerate andesite, and hornblende porphyry basalt in eastern hills and Eocene flysch in south of the regionThe host intrusive rocks of the mineralization are diorite porphyry are diorite porphyry and alterations include potassic, phyllic, argillic and silicification.The most prevalent mineralization texture is the dispersive texture and other open-space-filling texture, vein and veinlets, have been common either.In addition to stock work zones and thick silicate veins, the presence of diorite and maffic dikes, mineralized grey silicate veins, white silicate, silicate-barite, sulfide, gypsum and calcity are among important phenomena Masjed daghi ore.Petrography studies in 26 doubly polished thin sections and the measurement of geothermometry parameters of 105 primary fluid inclusions were carried out in 6 boreholes in four groups of grey silicate, white silicate, white-grey silicate, and silicate-barite veins.The presence of unknown solid phases, opaque solid phases along with salt phases and eutectic temperature (average of -40.86 Co) of fluid inclusions in Masjed daghi reinforced the necessity of recognizing all phases within fluid inclusions. 10 fluid inclusions were selected based on petrography studies and analyzed by laser Raman spectroscopy method. Laser Raman Spectroscopy was utilized and based on the main peaks of Raman intensity of the minerals such as magnetite, anglesite, malachite, serussite, corundum, orthoclase, anhydriteparagonite, hematite, within fluid inclusions in Masjed daghi area was investigated Manuscript profile

Open Access Article

7 - Design of Biosensor for Diagnosis of Bio-molecules Using Surface Enhanced Raman Spectroscopy
Babak Hassanshahi Sayyedjavad Sayyedfattahi

10.30495/ijbbo.2021.686484

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Open Access Article

8 - Qualify Investigation and Detection of Major Constituents of Peppermint (Mentha piperita L.) Essential oil by Physical Methods as an Alternative to GC-MS
Mozhgan Jamshidian, Reza Dehghani Bidgoli Mehrdad Moradi

This article deals with evaluate the purity and detection of peppermint essential oil compositions using different spectrometry and refraction spectrometry methods and to compare them with chromatography. The conventional method for identifying and analyzing essential o More

This article deals with evaluate the purity and detection of peppermint essential oil compositions using different spectrometry and refraction spectrometry methods and to compare them with chromatography. The conventional method for identifying and analyzing essential oils is a costly gas chromatography-coupled mass spectrometer. For this purpose, peppermint essential oil extract was first extracted and its main constituents were identified by chromatogram, menthol and menthon. Then using fast and low cost Raman spectroscopy method with three different spectrometers, two compounds of menthon and menthol were determined. Refractometry and FTIR spectroscopy were used to evaluate the purity of peppermint essential oil. Concentrations of 20, 30, 40, 60, 80 and 90 peppermint essential oils were manually made by cyclohexane solvent. These different concentrations and sample were tested by Refractometry and FTIR spectroscopy. As the results show, infrared spectroscopy is not capable of quantitatively identifying the essence of pure peppermint and its diluted concentrations and is only capable of qualitatively identifying different molecules, but can be clearly distinguishable by the use of refractive index analysis of different concentrations and pure samples. Therefore, Raman spectroscopy and refractive analysis is a fast and inexpensive method capable of identifying the major constituents and determining the purity of the essential oils. Manuscript profile

Open Access Article

9 - The growth of Diamond like carbon nanostructures: Investigation of the affecting factors
Morasa Amani Malkeshi karim Zare Mahmood Ghorannevis Zohre Ghorannevis omid Moradi

10.22034/jna.2017.540582.1008

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Open Access Article

10 - Simulation and Analysis of the Effect of Parameters on the Spectral Response of Electric Field Enhancement Factor in the Proposed AFM-TERS System
Mohsen Katebi Jahromi Rahim Ghayour Zahra Adelpour

One of the most important advances in Raman spectroscopy in recent years has been its integration with scanning probe microscopes (SPM), especially atomic force microscopes (AFM). Currently, AFM is recognized as one of the best imaging methods for studying the distribut More

One of the most important advances in Raman spectroscopy in recent years has been its integration with scanning probe microscopes (SPM), especially atomic force microscopes (AFM). Currently, AFM is recognized as one of the best imaging methods for studying the distribution of heterogeneous surface in nanoscale dimensions. Scientists are now focused on obtaining more enhancement factor of electric field, to the extent that detection and mapping of only one molecule has become possible with this method. Therefore, spatial resolution is being improved in detecting sub-molecule levels. In this paper, using the finite difference time domain (FDTD) calculation method, the effect of changing the parameters of the probe such as cone angle, tip radius and its material on the electric field intensity near the apex of the probe is investigated. In addition, the effect of polarization of light on the increase of electric field has been analyzed. The simulation results obtained for different cone angles show that the cone angle of 30 degree creates the highest amount of electric field enhancement factor at the tip apex. Furthermore, the use of laser source with radially polarized light and the use of substrate are very effective factors on improving the electric field enhancement factor. Finally, the maximum value of electric field enhancement factor of the proposed configuration is 3.2×104, where this value has been improved significantly comparing to the results reported in the previous papers published in this field. Manuscript profile

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