Search results for: COMB 1 MM THICK 16 SAMPLE
#36570472 2022/12/13 To Up
Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics.
Ultrafast pump-probe measurements are used to characterize various samples, such as biological cells, bulk, and thin-film structures. However, typical implementations of the pump-probe apparatus are either slow or complex and costly hindering wide deployment. Here we combine a single-cavity dual-comb laser with a simple experimental setup to obtain pump-probe measurements with ultra-high sensitivity, fast acquisition, and high timing precision over long optical delay scan ranges of 12.5 ns that would correspond to a mechanical delay of about 3.75 m. We employ digital signal balancing to obtain shot-noise-limited detection compatible with pump-probe microscopy deployment. Here we demonstrate ultrafast photoacoustics for thin-film sample characterization. We measured a tungsten layer thickness of (700 ± 4) Å with shot-noise-limited detection. Such single-cavity dual-comb lasers can be used for any pump-probe measurements and are especially well-suited for ultrafast photoacoustic studies such as involving ultrasonic echoes, Brillouin oscillations, surface acoustic waves and thermal dynamics.J Pupeikis, W Hu, B Willenberg, M Mehendale, G A Antonelli, C R Phillips, U Keller
1326 related Products with: Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics.
0.1ml 100ul100ug Lyophilized0.1ml (1mg/ml) 100ul100 μg100ug Lyophilized50ul 100ul 100ul 100ulRelated Pathways
#24512280 2014/02/24 To Up
Combinatorial screening of potentiometric Pb(II) sensors from polysulfoaminoanthraquinone solid ionophore.
A potentiometric Pb(II)-selective sensor was fabricated by a combinatorial screening of electrically conducting polysulfoaminoanthraquinone (PSA) nanoparticles as a solid ionophore, ion exchangers (oleic acid (OA) and NaTPB), plasticizers in a polyvinyl chloride (PVC) matrix, membrane thickness, inner filling ion species, and concentration. The membrane sensor with the composition of PSA/PVC/DOP (dioctyl phthalate)/OA (1.0:33:61:5.0) exhibited the best performance, including a slope of 29.3 mV decade(-1) in the concentration range 10(-6.3)-10(-1.6) M, detection limit of 1.6 × 10(-7) M, response time of 16 s, lifetime of five months, and good response reversibility. The proposed sensor has demonstrated good selectivity for Pb(II) over other monovalent, divalent and trivalent interfering ions, and could be used in a pH range of 3.62-5.22. The Pb(II) sensor has been successfully applied for the determination of Pb(II) concentration in real-world samples and also as an indicator electrode for potentiometric titration of lead ions.Mei-Rong Huang, Yong-Bo Ding, Xin-Gui Li
1964 related Products with: Combinatorial screening of potentiometric Pb(II) sensors from polysulfoaminoanthraquinone solid ionophore.
5 mg5 mg5 mg1 mg1 mg25 mg5 mg5 mg5 mg5 mgRelated Pathways
#23092166 // To Up
Simultaneous assay of ascorbate and urate antioxidants in human blood serum using PEDOT-based electrochemical microsensor.
An electrochemical microsensor has been developed for the simultaneous assay of ascorbate (AA) and urate (UA) antioxidants in human blood serum. The electrode surface was modified by means of electropolymerized conductive poly(3,4-ethylenedioxythiophene) PEDOT organic films. Highly selective responses (detection potential difference more than 250 mV) were obtained for both biomarkers by optimizing the PEDOT thickness. Contrary to most previous studies the analytical performances were recorded by testing the microsensor directly in blood serum without any pretreatment of the samples. Using differential pulse voltammetry (DPV) the sensitivity and detection limit were 0.481 μA μM(-1) cm(-2) and 4.2 μmol L(-1) for AA and 1.815 μA μM(-1) cm(-2) and 2.0 μmol L(-1) for UA. The calibration curves were linear in the concentration range 5-200 μmol L(-1) for AA and 3-700 μmol L-1 for UA. The accuracy of the sensor was satisfactorily compared with the reference analytical methods provided that the synergic effect between both antioxidants was considered. The sensor response was unmodified in the presence of the major biochemical interfering species.Fadhila Sekli-Belaidi, Anne Galinier, Pierre Gros
1810 related Products with: Simultaneous assay of ascorbate and urate antioxidants in human blood serum using PEDOT-based electrochemical microsensor.
10ml5ml 100 UG96T1000ml10 mg96T100 μg100 μg100 μg100 μgRelated Pathways
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