To study the thermal stability of the NPs and (DTXL + siRNA)@NPs, the TGA analysis was conducted. The blank NPs and (DTXL + siRNA)@NPs were analyzed by TGA using Pelkin-Elmer TGA 7 Thermogravimetric analyzer (Perkin-Elmer, Waltham, MA, USA). The temperature ranged from 0 to 800 °C at 10 °C/min of heating rate.
Tga 7 thermogravimetric analyzer
Manufactured by PerkinElmer
Sourced in United States
The TGA-7 is a thermogravimetric analyzer designed to measure changes in the weight of a sample as a function of temperature or time. It provides accurate and precise measurements of sample weight changes, enabling the analysis of thermal stability, composition, and reactions. The TGA-7 is a core laboratory instrument used for material characterization and research applications.
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Lab products found in correlation
D8 advance diffractometer, by Bruker (1 mentions)
Perkin elmer 2400 elemental analyzer, by PerkinElmer (1 mentions)
Jes fa200 epr spectrometer, by JEOL (1 mentions)
D max 2550 diffractometer, by Rigaku (1 mentions)
Nicolet 6700 ft ir spectrometer, by Thermo Fisher Scientific (1 mentions)
Uv 2450 spectrophotometer, by Shimadzu (1 mentions)
Zetasizer nano z, by Malvern Panalytical (1 mentions)
Spectrum bx ft ir spectrometer, by PerkinElmer (1 mentions)
Mr400 nmr spectrometer, by Agilent Technologies (1 mentions)
Jem 1400 plus transmission electron microscope, by JEOL (1 mentions)
Asap 2020, by Micromeritics (1 mentions)
U 3010 uv vis spectrophotometer, by Hitachi (1 mentions)
Dmx 400 spectrometer, by Bruker (1 mentions)
Im6e electrochemical workstation, by Zahner (1 mentions)
Maia 3 scanning electron microscope, by TESCAN (1 mentions)
Zen 3600 zetasizer, by Malvern Panalytical (1 mentions)
Tecnai g2 spirit tem microscope, by Thermo Fisher Scientific (1 mentions)
12 protocols using tga 7 thermogravimetric analyzer
1
Thermal Stability Analysis of Nanoparticles
2
Thermogravimetric Analysis of PPy Carbonization
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Thermogravimetric analysis was used at first as an analytical tool of PPy carbonization. This was performed in 50 cm3·min−1 nitrogen flow at a heating rate of 10 °C·min−1 with a TGA 7 Thermogravimetric Analyzer (Perkin Elmer, Waltham, MA, USA). A comparative experiment in air has also been done.
In a preparative carbonization, 5 g of PPy nanotubes or globular PPy bases were heated in an inert nitrogen atmosphere to 650 °C in an electric oven. The selection of this particular temperature was made according previous experiments on polyaniline and PPy. In case of polyaniline it follows from the evolution of the infrared and Raman spectra that after carbonization at 650 °C, the G and D bands characteristic of a carbon material are well developed and the residue of the sample is close to 60 wt %. It has been proven also for nanotubular PPy derived carbon nanotubes [20 (link)]. When the carbonization temperature was lower, the carbonization was not complete. At higher temperatures, the yield of carbonized product is substantially reduced.
The heating was switched on, and the temperature increased at 10 °C·min−1 rate. After the target temperature was reached, the heating was switched off, and the residue was left to cool down in the flowing nitrogen stream.
In a preparative carbonization, 5 g of PPy nanotubes or globular PPy bases were heated in an inert nitrogen atmosphere to 650 °C in an electric oven. The selection of this particular temperature was made according previous experiments on polyaniline and PPy. In case of polyaniline it follows from the evolution of the infrared and Raman spectra that after carbonization at 650 °C, the G and D bands characteristic of a carbon material are well developed and the residue of the sample is close to 60 wt %. It has been proven also for nanotubular PPy derived carbon nanotubes [20 (link)]. When the carbonization temperature was lower, the carbonization was not complete. At higher temperatures, the yield of carbonized product is substantially reduced.
The heating was switched on, and the temperature increased at 10 °C·min−1 rate. After the target temperature was reached, the heating was switched off, and the residue was left to cool down in the flowing nitrogen stream.
3
Thermogravimetric Analysis of Composites
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Thermogravimetric analysis was performed in a Perkin Elmer TGA-7 thermogravimetric analyzer (Norwalk, CT, USA), from 45 to 750 °C at a heating rate of 10 °C/min, under nitrogen atmosphere. From the first derivative curve, the decomposition temperature of composites was determined.
4
Comprehensive Characterization of Novel Material
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All chemical samples were obtained from commercial sources and used without further purification. The X-ray diffraction (XRD) pattern was obtained with a Bruker D8 Advance diffractometer with Cu-Kα (λ = 1.5418 Å, 40 kV, 40 mA) radiation in the scan range of 4–40° with a step size of 0.02°. The elemental analysis was conducted on a Vario EL cube elemental analyzer. ICP-AES (inductively coupled plasma-atomic emission spectroscope) analysis was performed on a PerkinElmer Optima 3300DV ICP instrument. FT-IR spectra was recorded on a Nicolet Impact 410 spectrometer between 400 and 4000 cm−1 using the KBr pellet method. Thermogravimetric analysis (TGA) was conducted on a PerkinElmer TGA 7 thermogravimetric analyzer at a ramp rate of 10 °C min−1 under a flow of air gas from room temperature to 800 °C. Photoluminescence analyses were performed on an Edinburgh Instrument FLS920 luminescence spectrometer.
5
Synthesis and Characterization of H4bdcbpy·Br2
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1,1′-Bis(3,5-dicarboxybenzyl)-4,4′-bipyridinium dibromide (H4bdcbpy·Br2,) was obtained according to the procedure in the literature [26 (link)], all the other chemical reagents were commercially obtained and used without further purification. Powder X-ray diffraction (PXRD) patterns were performed on a Rigaku D-Max 2550 diffractometer (Rigaku Corporation, Tokyo, Japan), using Cu-Kα radiation (α = 1.5418 Å) in a 2θ range of 4–40°. The elemental analysis was performed on a Perkin-Elmer 2400 elemental analyzer (PerkinElmer, Waltham, MA, USA). The infrared spectrum was collected in the range of 400–4000 cm−1 on a Nicolet 6700 FT-IR spectrometer (Thermo Scientific, Waltham, MA, USA). The UV-vis absorption spectra were recorded on a Shimadzu UV-2450 spectrophotometer (Shimadzu Corporation, Kyoto, Japan). Electron paramagnetic resonance (EPR) spectra were collected using a JEOL JES-FA200 EPR spectrometer (JEOL Ltd., Tokyo, Japan). Thermo-gravimetric analysis (TGA) was carried out on a Perkin-Elmer TGA-7 thermogravimetric analyzer (PerkinElmer, Waltham, MA, USA) from room temperature to 800 °C in air atmosphere at a heating rate of 10 °C min−1.
6
Thermogravimetric Analysis of Samples
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Thermogravimetric analysis was performed on a TGA 7 Thermogravimetric Analyzer (PerkinElmer, Shelton, CT, USA), and samples were carried out at a heating rate of 10° C/min nitrogen atmosphere.
7
Characterization of UiO-66 Metal-Organic Framework
8
Characterization of Hybrid Aerogel Properties
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The apparent density was obtained by measuring the mass with a microbalance (precision ± 0.1 mg) and the volume of the cylindrical samples with a slide caliper (accuracy 1/20 mm).
The textural characteristics of the hybrid aerogels were investigated using nitrogen physisorption experiments (Micromeritics ASAP2020, working at 77 K, and equipped with pressure transducer resolution of 10−4 mm Hg). Specific surface area, specific pore volume, and mean pore diameter were determined, considering standard models for the analysis (BET and BJH, respectively) [10 ]. Prior to these experiments, samples were milled in an agate mortar and degassed at 120 °C for 6 h.
Thermogravimetric analysis (TGA) was performed on a Perkin-Elmer TGA7 thermogravimetric analyzer (Madrid, Spain) at 10 °C min−1 and ramped from 50 to 900 °C under air atmosphere. The different weight loss steps were determined in order to evaluate the hydroxyl contents (–OH groups) for dehydration up to 200 °C and dehydroxylation from 400 to 700 °C.
The textural characteristics of the hybrid aerogels were investigated using nitrogen physisorption experiments (Micromeritics ASAP2020, working at 77 K, and equipped with pressure transducer resolution of 10−4 mm Hg). Specific surface area, specific pore volume, and mean pore diameter were determined, considering standard models for the analysis (BET and BJH, respectively) [10 ]. Prior to these experiments, samples were milled in an agate mortar and degassed at 120 °C for 6 h.
Thermogravimetric analysis (TGA) was performed on a Perkin-Elmer TGA7 thermogravimetric analyzer (Madrid, Spain) at 10 °C min−1 and ramped from 50 to 900 °C under air atmosphere. The different weight loss steps were determined in order to evaluate the hydroxyl contents (–OH groups) for dehydration up to 200 °C and dehydroxylation from 400 to 700 °C.
9
Characterization of Organic Compounds
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1H NMR and 13C NMR spectra of the corresponding compounds were measured on a Bruker DMX-400 spectrometer using d–chloroform as solvent and trimethylsilane as the internal reference. High-temperature gel permeation chromatography (GPC) measurements were carried out on Agilent PL-GPC 220 instrument, using 1,2,4-trichlorobenzene as the eluent at 160 °C. Thermogravimetric analysis (TGA) was measured on a Perkin-Elmer TGA-7 thermogravimetric analyzer with a heating rate of 10 °C min−1 under a nitrogen flow rate of 100 mL min−1. UV–visible absorption spectra were measured on a Hitachi U-3010 UV–vis spectrophotometer. Electrochemical cyclic voltammograms was measured on a Zahner IM6e Electrochemical Workstation under a nitrogen atmosphere, with a Pt disk as working electrode, a Ag/AgCl as reference electrode, and a Pt wire as counter electrode in acetonitrile solution of tetrabutylammonium hexafluorophosphate (n-Bu4NPF6), and ferrocene/ferrocenium (Fc/Fc+) couple was used as an internal reference.
10
Thermogravimetric Analysis of Freeze-Dried Product
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A few milligrams of freeze‐dried product were insulated from the ambient atmosphere through crimping of a capsule. A hole was made at the top of the capsule using a needle just before placement in the TGA7 thermogravimetric analyzer (PerkinElmer). The sample was subjected to a temperature increase of 5°C/min. between ambient temperature and 250°C. The water content was measured as the loss of mass observed up to about 110°C. The Pyris (PerkinElmer) software was used to extrapolate residual moisture from the thermograms.
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