We proposed a complex method based on a combination of shadow photography and time-resolved Raman spectroscopy to observe the non-stationary laser-induced supercritical state in molecular media. Shadow photography is applied for retrieving pressure values, while Raman spectroscopy with molecular dynamics for temperature estimation. Time resolution of 0.25 ns is achieved by varying the delay between the pump (creating an extreme energy delivery) and the probe laser pulses by the self-made digital delay electronic circuit . The proposed method was employed in liquid carbon dioxide and water. Under nanosecond laser pulse impact, the estimated temperatures and pressures (∼700 K and ∼0.5 GPa) achieved in media are higher than the critical parameters of the samples.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.441690 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Preparation of anti-shrinkage branched poly (butylene succinate-co-butylene terephthalate)/cellulose nanocrystal foam with excellent degradability and thermal insulation.
Int J Biol Macromol
January 2025
State Key Laboratory of Chemical Engineering, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address:
Branched poly (butylene succinate-co-butylene terephthalate) (BPBST) was synthesized by in-situ polycondensation to enhance the foamability of poly (butylene succinate-co-butylene terephthalate) (PBST) and was blended with cellulose nanocrystals (CNC) to address foam shrinkage. The introduction of 2 wt% CNC increased the crystallization temperature of BPBST from 66.6 °C to 87.
View Article and Find Full Text PDFA review of emerging techniques for pyrethroid residue detection in agricultural commodities.
Heliyon
January 2025
Laboratory of Vaccine and Biomolecules, Institute of Bioscience, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia.
Pyrethroid pesticides are essential for modern agriculture, helping to control pests and protect crops. However, due to growing concerns about their potential impact on human health and the environment, reliable detection methods are essential to ensure food safety. In this literature review, we explore the techniques used over the past decade to detect pyrethroid residues in agricultural products.
View Article and Find Full Text PDFNovel Approach for Efficient Separation of Primary Amines Using Supercritical Fluid Chromatography.
Chirality
January 2025
State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu, China.
Efficient enantioselective separation is a critical process in pharmaceutical and chemical industries for the production of chiral compounds. Herein, we developed a novel approach for the efficient enantioselective separation of primary amines using supercritical fluid chromatography (SFC) with a commercially available SFC column, Cel1. The key factors of separation, including cosolvent ratios, total cosolvent percentages, and temperature, were systematically assessed in this study.
View Article and Find Full Text PDFApplication of Supercritical CO Extraction and Identification of Polyphenolic Compounds in Three Species of Wild Rose from Kamchatka: , , and .
Plants (Basel)
December 2024
N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia.
A comparative metabolomic study of three varieties of wild Rosa (, , and ) from a Kamchatka expedition (2024) was conducted via extraction with supercritical carbon dioxide modified with ethanol (EtOH), and detection of bioactive compounds was realized via tandem mass spectrometry. Several experimental conditions were investigated in the pressure range 50-350 bar, with the used volume of co-solvent ethanol in the amount of 2% in the liquid phase at a temperature in the range of 31-70 °C. The most effective extraction conditions are the following: pressure 200 Bar and temperature 55 °C for ; pressure 250 Bar and temperature 60 °C for ; pressure 200 Bar and temperature 60 °C for .
View Article and Find Full Text PDFUnveiling hidden reaction kinetics of carbon dioxide in supercritical aqueous solutions.
Proc Natl Acad Sci U S A
January 2025
Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China.
Dissolution of CO in water followed by the subsequent hydrolysis reactions is of great importance to the global carbon cycle, and carbon capture and storage. Despite numerous previous studies, the reactions are still not fully understood at the atomistic scale. Here, we combined ab initio molecular dynamics (AIMD) simulations with Markov state models to elucidate the reaction mechanisms and kinetics of CO in supercritical water both in the bulk and nanoconfined states.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!