X-ray diffractometer (XRD) patterns were collected on X-ray diffractometer (SHIMADU) with Cu Kα radiation (λ = 1.5418 Å). X-ray photoelectron spectroscopy (XPS) was carried out on a photoelectron spectrometer (PHI 5400 ESCA System, Al Kα). The current density–voltage data was collected through an electrochemical workstation with a scan rate of 0.2 V s−1 (VersaSTAT 3, Ametek, USA) under AM 1.5 G illumination (100 mW cm−2, Newport 9402A) calibrated by a standard Si solar cell (1218, Newport, USA). The monochromatic incident photon-to-electron conversion efficiency (IPCE) was carried out by the Crowntech solar cell quantum efficiency measurement system (QTest station 500AD, USA) containing a monochromator, a chopper, a lock-in amplifier, and a multimeter (Keithley Model 2000). Photoluminescence (PL) spectra were measured by a fluorescence spectrometer (LS55 PerkinElmer, PE) with an excitation wavelength of 400 nm. Electrochemical impedance spectroscopy (EIS) was measured in the dark by the electrochemical workstation (VersaSTAT 3, Ametek, USA) with a bias of −0.9 V. The frequency range is 100 kHz to 0.1 Hz. The space-charge-limited current (SCLC) curves were measured under the linear sweep method with the voltage range from −5.0 V to 5.0 V by the electrochemical workstation (VersaSTAT 3, Ametek, USA).
Versastat 3
Manufactured by Ametek
Sourced in United States
The VersaSTAT 3 is a versatile and advanced electrochemical workstation designed for a wide range of electrochemical applications. It provides a comprehensive set of potentiostatic and galvanostatic control capabilities, enabling researchers and engineers to perform various electrochemical measurements and analyses with precision and flexibility.
Automatically generated - may contain errors
Lab products found in correlation
Potassium chloride (kcl), by Merck Group (2 mentions)
Peptir 1, by Biomatik (2 mentions)
Lb agar, by Merck Group (2 mentions)
Potassium hexacyanoferrate 2, by Merck Group (2 mentions)
Potassium hexacyanoferrate 3, by Merck Group (2 mentions)
Gold 3 chloride hydrate, by Merck Group (2 mentions)
Spectracarb 2050a 0550, by Fuel Cell Store (2 mentions)
Versascan, by Ametek (1 mentions)
Phosphate buffered saline (pbs), by Thermo Fisher Scientific (1 mentions)
Hanks balanced salt solution (hbss), by Thermo Fisher Scientific (1 mentions)
Cr2032, by MTI Corporation (1 mentions)
Ct 4008, by Neware (1 mentions)
Spectrum 100, by PerkinElmer (1 mentions)
Tensor 27, by Bruker (1 mentions)
Avance 250, by Bruker (1 mentions)
Alpha t, by Bruker (1 mentions)
Alpha compact ft ir spectrometer, by Bruker (1 mentions)
Samarium nitrate, by Merck Group (1 mentions)
S 4700, by Hitachi (1 mentions)
F 4500 fluorescence spectrophotometer, by Hitachi (1 mentions)
75 protocols using versastat 3
1
Comprehensive Characterization of Solar Cell Materials
2
Electrochemical Characterization of PEDOT:PSS Hydrogels
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CV and EIS were conducted using a potentiostat (VersaSTAT 3; Princeton Applied Research). A platinum plate electrode was used as the counter electrode, and a Ag/AgCl (3 M KCl) electrode was used as the reference electrode. All samples were soaked in PBS for 1 hour before measurements. The cyclic voltammogram was recorded (versus Ag/AgCl reference electrode from −0.6 to 0.6 V). The frequency of EIS ranged between 1 and 10 kHz with a potential bias of 10 mV. For electrochemical measurements under strain, all PEDOT:PSS hydrogels were clamped in a laboratory-made stretch station and stretched up to 30% during CV and EIS. The charge injection capacity was performed by exerting cathodal first, biphasic, charge-balanced current pulse through chronoamperometry (−0.6 V versus Ag/AgCl for 10 ms and 0.6 V versus Ag/AgCl for 10 ms) using an electrochemical workstation (VersaSTAT 3; Princeton Applied Research).
3
Scanning Electrochemical Microscopy of Hydrogen Generation
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A Versa SCAN (Ametek, Berwyn, PA, USA) SECM workstation was used in connection with a Versa STAT 3 and Versa STAT 3F bipotentiostat (Princeton Applied Research, Oak Ridge, TN, USA). The substrate-generation tip-collection (SG/TC) mode was used, where the sample being investigated was used to generate hydrogen, and the tip would oxidize the generated products. The electrolyte was 0.5 M H2SO4, as previously used. The probe was a Pt ultramicroelectrode with a diameter of 10 μm. The probe was positioned ~10 μm above the sample and a constant height mode was used, which may be prone to errors from uneven sample mounting. However, possible errors were minimized by examining a small area (X–Y 100 × 150 μm) and a 5 μm s−1 tip scan rate. The SECM maps presented in the discussion are 100 × 100 μm because the first 100 × 50 μm data were typically distorted by the settling of either the substrate generation or tip collection current. The first scan lines were considered as pretreatment and discarded.
4
Electrochemical Evaluation of Copper Oxide Catalysts
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Cyclic voltammetry (CV) and chronoamperometry (CA) were carried out at room temperature to measure the electro-catalytic properties of the copper oxide electrodes. The electro-catalytic activity of the electrodes for methanol oxidation was investigated using a potentiostat (Princeton Applied Research, VersaSTAT 3) in a standard three-electrode system. Copper oxide was used as a working electrode, a Pt foil as the counter electrode and SCE as the reference electrode. Solutions containing 1 M KOH without and with 0.5 M Methanol were used as the electrolyte.
5
Electrochemical Biosensor for Pathogen Detection
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All reagents were used as received without further purification. Potassium hexacyanoferrate (II) (K4[Fe(CN)6] × 3H2O, ≥98%, Merck, Darmstadt, Germany), potassium hexacyanoferrate (III) (K3[Fe(CN)6], ≥99%, Merck), gold (III) chloride hydrate (HAuCl4 × 3H2O, ≥99%, Sigma Aldrich, Saint Louis, MO, USA), potassium chloride (KCl ≥ 99%, Sigma Aldrich), LB-Agar (Merck).
The peptide PEPTIR‑1.0 (sequence QKVNIDELGNAIPSGVLKDD) was synthesized by Biomatik® (Wilmington, DE, USA) with a purity of >95%. A cysteine was included in the N-terminal region of the chain. The bacterial strains used were the references ATCC 43,895 E. coli O157:H7, ATCC 25,923 S. aureus and ATCC 27,853 P. aeruginosa.
Screen‑printed electrodes were acquired commercially (Palmsens) from the manufacturer Italsens, which consists of a working (7.07 mm2), an auxiliary carbon electrode and a silver/silver chloride (Ag/AgCl) reference electrode.
Electrochemical measurements and evaluation of the biosensor was performed on a potentiostat/galvanostat VersaSTAT 3 (Princeton Applied Research) controlled by Versastudio (v. 2.60.6.) software.
The peptide PEPTIR‑1.0 (sequence QKVNIDELGNAIPSGVLKDD) was synthesized by Biomatik® (Wilmington, DE, USA) with a purity of >95%. A cysteine was included in the N-terminal region of the chain. The bacterial strains used were the references ATCC 43,895 E. coli O157:H7, ATCC 25,923 S. aureus and ATCC 27,853 P. aeruginosa.
Screen‑printed electrodes were acquired commercially (Palmsens) from the manufacturer Italsens, which consists of a working (7.07 mm2), an auxiliary carbon electrode and a silver/silver chloride (Ag/AgCl) reference electrode.
Electrochemical measurements and evaluation of the biosensor was performed on a potentiostat/galvanostat VersaSTAT 3 (Princeton Applied Research) controlled by Versastudio (v. 2.60.6.) software.
6
Electrochemical Characterization of NiO Electrode
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Example 3
The electrochemical characterization was done by a 3-electrode system using a potentiostat (VersaSTAT3, Princeton Applied Research, USA). The FTO/NiO, mercury/mercury oxide (Hg/HgO), and platinum (Pt) foil were used as working electrode, reference electrode, and counter electrodes, respectively. An aqueous solution of 6.0 molar (M) potassium hydroxide (KOH) was used as an electrolyte for EIS, CV, and GCD characterizations. The EIS spectra were acquired in a frequency range of 0.05 Hz to 100 KHz (applied alternating current (A/C) voltage of 5 mV.
The EIS results were studied using Nyquist plots, which include the real (Z′) and imaginary (Z″) parts of impedance. The CV characterization was done at the scan speed (ν) of 5-200 mV/s in 0-0.6 V (vs. Hg/HgO). The GCD measurement was performed in 0-0.5 V (vs. Hg/HgO).
7
Electrochemical Characterization of 3D-Printed Conducting Polymer
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Cyclic voltammetry (CV) of the 3D-printed conducting polymer was performed by using a potentiostat/galvanostat (VersaSTAT 3, Princeton Applied Research) with a range of scan rates (50 to 500 mV s−1). Pt wires (diameter, 1 mm) were employed as both working and counter electrodes, and an Ag/AgCl electrode was used as the reference electrode. Prior to all measurements, the working and counter electrodes were cleaned successively with abrasive paper, deionized water, and ethyl alcohol. PBS was used as the supporting electrolyte.
Electrochemical impedance spectroscopy (EIS) measurements of the 3D-printed conducting polymer were carried out by using a potentiostat/galvanostat (1287 A, Solartron Analytical) and a frequency response analyzer (1260 A, Solatron Analytical) in an electrochemical cell installed with Pt sheet as both working and counter electrodes and Ag/AgCl as a reference electrode. The frequency range between 0.1 and 100 kHz was scanned in PBS with an applied bias of 0.01 V vs. Ag/AgCl. The EIS data for the 3D-printed conducting polymer were fitted by using an equivalent circuit model for further analysis (Fig.3d ).
Electrochemical impedance spectroscopy (EIS) measurements of the 3D-printed conducting polymer were carried out by using a potentiostat/galvanostat (1287 A, Solartron Analytical) and a frequency response analyzer (1260 A, Solatron Analytical) in an electrochemical cell installed with Pt sheet as both working and counter electrodes and Ag/AgCl as a reference electrode. The frequency range between 0.1 and 100 kHz was scanned in PBS with an applied bias of 0.01 V vs. Ag/AgCl. The EIS data for the 3D-printed conducting polymer were fitted by using an equivalent circuit model for further analysis (Fig.
8
Electrochemical Characterization of H2O2 Oxidation
9
Electrochemical Characterization of Stretchable v-AuNWs Electrode
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Cyclic voltammetry (CV) and Linear Sweep Voltammetry (LSV) characterization of v-AuNWs based stretchable electrode (fixed on a homemade stretching device) under different stretched states were performed by an electrochemical workstation (VersaSTAT3, Princeton Applied Research). In 5 mM aqueous solution, the scan range was from −0.4 V to 0.8 V with the scan rate of 50 mV/s; In 2 mM aqueous solution, the scan range was from 0.7 V to 1.3 V with the scan rate of 50 mV/s. Electrochemical impedance spectroscopy (EIS) was carried out in 5 mM solution containing 0.1 M KCl, and the frequency from 105 Hz to 1 Hz.
10
Potentiostatic Polarization of Coin Cells
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Potentiostatic polarization experiments (VersaSTAT3, Princeton Applied Research, AMETEK Inc.) were conducted using hermetically sealed coin cells (CR2032, MTI Corporation). The polymer membranes were sandwiched between Al-foils (MTI Corporation) and annealed at 60 °C for 24 h before the measurements at room temperature. Cells were polarized using potentials, ΔV, of 50 mV for all samples. The ac impedance spectroscopy measurements were performed before and after the polarization.
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