chanelink logo
CHANELINK
Ελληνικά

Researchers Obtaining Scientific Returns from Raman Spectroscopy for External Bioexploration Using Lasers

714
2023-10-23 15:09:27
Δείτε τη μετάφραση

We investigated the potential of laser selection in a wide optical range from ultraviolet to visible light, and then to infrared (excitation wavelengths of 325, 532, 785, and 1064 nm), in order to combine and analyze extreme microorganisms related to Earth (such as Cryptomeria elegans, cold floating nematodes, and circular green algae), carbon water compound molecules, as well as simulated mineral mixtures (P-MRS, S-MRS, LRS, and JSC-1) of weathering layers on the Martian and lunar surfaces.

We demonstrate that the optimization of laser photon energy provides (at least one selected excitation wavelength) high-end quality Raman spectroscopy for each inspection sample. In most cases, the infrared spectral range is advanced for biological samples, while excitation within the visible and ultraviolet spectral ranges is usually advantageous, or at least sufficient to accurately identify/analyze mineral phases under luminescent laser spots on simulated planetary surfaces.

UV excitation does not always provide a significant contrast in Raman Stokes response to induced photoluminescence in the studied biomolecules. The most prominent feature in the Raman spectrum of biological samples is assigned to their specific pigments, and is also considered a biomolecular feature of extreme microorganisms. The key issue of the specific advantages and limitations of each specific excitation source means that research can obtain scientific returns from Raman spectroscopy for external biological exploration, such as the optimal trading between single or double excitation wavelengths of biological and geological spectral data.

Source: Laser Network

Σχετικές προτάσεις

  • LM GROUP USA expands its North American office

    Recently, BLM GROUP USA, a leading manufacturer of laser tube and sheet metal processing equipment, announced that its North American headquarters in Novi, Michigan has officially started construction, with plans to add 65000 square feet of modern facilities. It is expected to be completed and put into use in the third quarter of 2025.The specific investment amount for this expansion has not been ...

    2024-08-03
    Δείτε τη μετάφραση

  • Implementation of 20W high-power fiber optic frequency comb by the Institute of Physics, Chinese Academy of Sciences

    High power optical frequency combs play a crucial role in nonlinear precision spectroscopy, extreme ultraviolet optical frequency comb generation, nuclear atomic clock research, and other fields. Fiber optic femtosecond lasers are the preferred solution for achieving high power optical frequency combs due to their simple structure, stable performance, and easy amplification.However, due to the una...

    2023-10-11
    Δείτε τη μετάφραση

  • Research progress on aerospace materials and anti ablation coatings: a review

    India B R. Dr. Jalandal Ambedkar National Institute of Technology and the Indian Institute of Technology reviewed and reported on the research progress of aerospace materials and anti ablation coatings. The related paper was published in Optics&Laser Technology under the title "Progress in aerospace materials and ablation resistant coatings: A focused review".a key:1. A comprehensive overview ...

    2024-11-21
    Δείτε τη μετάφραση

  • Shanghai Institute of Optics and Fine Mechanics has made progress in the research of interferometer wavefront calibration methods

    Recently, the research team of the High end Optoelectronic Equipment Department at the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has made progress in the study of wavefront calibration methods for interferometer testing. The relevant research results were published in Optics Express under the title of "High precision wavefront correction method ininterometer tes...

    2024-07-23
    Δείτε τη μετάφραση

  • Scientists have developed a palm sized femtosecond laser using a glass substrate

    Researchers at the Federal College of Technology in Lausanne (EPFL) have shown that femtosecond lasers suitable for palm size can be manufactured using glass substrates.Can femtosecond lasers made entirely of glass become a reality? This interesting question prompted Yves Bellouard, the head of the Galata laboratory at the Federal Institute of Technology in Lausanne, to embark on a journey after y...

    2023-10-04
    Δείτε τη μετάφραση