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13 protocols using photomultiplier

1

Adsorption and Photoluminescence of JUK-20-x

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The
adsorption measurements for N2, CO2, water (H2O and D2O), and alcohol vapors were performed at
77, 273–293, 293, and 300 K, respectively. The virtual porosity
of JUK-20-x was analyzed using Zeo++ calculations of the framework
models based on the crystal structures (Table S1).44 (link) The carbon dioxide heat of
adsorption was determined by fitting a Freundlich model for carbon
dioxide adsorption isotherms at three temperatures: 273, 283, and
293 K. Solid-state photoluminescent characterization for all reported
compounds was performed using an FS5 spectrofluorometer (Edinburgh
Instruments) equipped with a Xe arc lamp (150 W, excitation spectra)
serving as an excitation source and a Hamamatsu photomultiplier of
the R928P type as a detector. Humidity-dependent measurements were
performed in situ using a home-made setup employing HG-100 RH humidity
generator (L&C Science and Technology).
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2

Microscopy Protocols for Tissue and Cell Imaging

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Images were acquired at room temperature using a Leica DM6 upright microscope (tissues), or a Zeiss LSM700 confocal microscope (tissues and single cells). For the LSM700, excitation lasers were 405 nM (DAPI and BV-421), 488 nM (FITC and Alexa488), 543 nM (R-PE and Alexa546), and 633 nM (Alexa680), with either 40×/1.3 or 63×/1.4 oil immersion objectives and collected using a Hamamatsu photomultiplier. Signal quantifications were done using Volocity (Perkin Elmer). For the DM6 microscope, the filter cubes used were DAPI, YFP, Cy3 and Cy5, with 20× objectives and collected using ORCAflash 4.0 V.2 from Hamamatsu, a high-resolution monochromatic camera. For each experiment, multiple fields were analyzed, excluding cells with saturated signal, abnormal DNA structure or mitotic figures. For figures, images were transferred to Photoshop for cropping, adjusting brightness and contrast for the whole image when necessary to enhance visibility.
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3

Millifluidic Lineage Tracking Assay

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The analysis with the millifluidic lineage tracking machine was performed after dilution in fresh LB medium (Sigma-Aldrich) to obtain, an average number of cell per drop λ ≈ 0.5. Drops were incubated and measured at 37°C as described in [12 (link), 13 (link)]. The fluorescence was measured using a photomultiplier (Hamamatsu) and a YFP filter set (479/40nm excitation and 530/40nm emission, Thorlabs) and an LED source (490nm, Thorlabs). In order to compare experiments, the data were normalized according to a reference measurement on the ancestral population.
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4

Magnetic and Spectroscopic Characterization

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Alternate-current (ac) and direct-current (dc) magnetic measurements were performed using a Quantum Design MPMS 3 SQUID magnetometer with an Evercool system. Samples during the measurements were placed in the hermetic FEP capsules under an Ar atmosphere. Excitation and emission spectra were recorded on the Edinburgh Instruments FS5 spectrofluorometer equipped with a Xe arc lamp as an excitation source and a Hamamatsu photomultiplier as a detector. Computational details regarding the ab initio calculations of CASSCF/RASSI/SINGLE_ANISO type (together with the related references) performed on the experimental crystal structures of 14 were discussed in the Supporting Information.
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5

Photocatalyst Photoluminescence Characterization

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PL measurements were performed by sampling the same surface areas of the photocatalyst and reference as well (1 cm2), at room temperature by an He–Cd laser (excitation wavelength of 325 nm). PL signals have been recorded by a monochromator and a water-cooled Hamamatsu photomultiplier.
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6

Temperature-Dependent Optical Characterization

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The PL and TR-PL measurements were performed as a function of the sample’s temperature in the range of 10–310 K in two positions on the film by exciting the sample with a solid-state pulsed laser (mod. PLP-10, Hamamatsu), which provided pulses at a wavelength of 400 nm for about 58 ps at a repetition rate of 1 MHz. The PL was dispersed with an iHR320 (focal length of 0.32 m) Horiba monochromator equipped with a Peltier cooled Hamamatsu photomultiplier (Head-on mod. R943-02), which operated in the single-photon-counting mode. The time-correlated single-photon-counting (TCSPC) technique was used to record the TR-PL with an Edinburg Instruments TCC900 TSCPC electronics card. The temporal resolution of the system was about 0.46 ns.
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7

Structural and Optical Characterization of Thin Films

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The distinct film thicknesses were measured using a profilometer (Dektak, Bruker, MA, USA). Their structural characteristics were analyzed using X-ray diffraction (XRD; INEL EQUINOX 2000) with Cu-Kα radiation (wavelength, λ = 0.15406 nm). The chemical composition and sample features were evaluated using X-ray photoelectron spectroscopy (XPS; K-Alpha model, Thermo Fisher Scientific, Waltham, MA, USA) with an Al–Kα monochrome X-ray source (for calibration, the C1s peak was used as the reference). The film’s optical properties were characterized via photoluminescence (PL) measurements (Hamamatsu photomultiplier attached to a SPEX spectrometer with a focal length of 50 cm); the film’s PL spectra were recorded with the 325 nm emission line of a 200 mW He–Cd laser. The surface morphologies of the produced films were examined using field-emission scanning electron microscopy (FESEM; JSM-7800F, JEOL, Tokyo, Japan) with an acceleration voltage of 3–5 kV. All of the characterizations were carried out at room temperature.
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8

Luminescence Spectra of Thin Films

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The luminescence spectra of films obtained by drop-casting from acetonitrile solutions on quartz slides were recorded at room temperature using a Fluorolog-3, Horiba JobinYvon spectrofluorimeter equipped with double-grating monochromator in both the excitation and emission sides. A 450 W Xe arc lamp and an R928P Hamamatsu photomultiplier were employed as excitation source and detector, respectively. The emission spectra were corrected for detection and optical spectral response of the spectrofluorimeter supplied by the manufacturer.
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9

Optical Properties of Y₂O₃ and Y₂O₃:Bi Thin Films

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The optical properties of all the annealed undoped Y2O3 and Y2O3:Bi thin films have been analyzed by photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy at room temperature (RT), performed by a Horiba Fluorolog spectrofluorimeter equipped with a 400 W Xe lamp. The excitation wavelength was varied between 300 nm and 550 nm with a scan step of 1 nm, while the luminescence was detected by a Hamamatsu Photomultiplier.
Cathodoluminescence (CL) properties have been investigated using a commercial Oxford CL system, fitted onto a Cambridge S360 standard tungsten gun scanning electron microscope. The CL system is equipped with a 1800 line/mm grating and a multialkali Photomultiplier sensitive in the range 350–830 nm. The spectroscopic CL analyses are carried out with an accelerating voltage of 3 kV at room temperature and at low temperature (liquid nitrogen, 77 K). The spectral resolution is 5 nm.
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10

Time-resolved Photoluminescence Measurements

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The time-resolved PL (TR-PL) measurements were performed by exciting the samples by a solid-state pulsed laser (mod. PLP-10, Hamamatsu), which provides pulse at a wavelength of 400 nm of about 58 ps at a repetition rate of 1 MHz. The PL has been dispersed using an iHR320 (focal length of 0.32 m) Horiba monochromator equipped with a Peltier cooled Hamamatsu photomultiplier (head-on mod R943-02), operating in single-photon counting. The time-resolved PL measurements have been performed by Time Correlated Single Photon Counting (TCSPC) technique using an Edinburg Instruments TCC900 TSCPC electronics card. The temporal resolution of the system is about 0.46 ns. The sample temperature has been changed by a closed circle He cryostat, allowing to change the temperature in the range 10–310 K. The fluorescence microscopy measurements have been performed with a Nikon C1 microscope, exciting the sample with a Hg lamp in the spectral range 340–380 nm, and collecting the F8BT and the NCs PL with band pass filter in the 515–555 nm and 580–630 nm range, respectively.
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