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Search for "DSC" in Full Text gives 64 result(s) in Beilstein Journal of Nanotechnology.
Fabrication of nanocrystal forms of ᴅ-cycloserine and their application for transdermal and enteric drug delivery systems
Beilstein J. Nanotechnol. 2024, 15, 465–474, doi:10.3762/bjnano.15.42
- storage conditions for the formulation of the DSC aqueous solution, and any potential incompatibilities between the DSC aqueous solution and other excipients. We found that without adding NaOH solution to the Formulation Test 2 and 3 in Table 1, the color of the DCS solution changed from colorless to dark
Two-dimensional molecular networks at the solid/liquid interface and the role of alkyl chains in their building blocks
Beilstein J. Nanotechnol. 2023, 14, 872–892, doi:10.3762/bjnano.14.72
- (melting point temperature Tm) of 1-HA-OCn and 2-HA-OCn was revealed. The Tm values measured by differential scanning calorimetry (DSC) increased upon increase of the alkyl chain length exhibiting a zigzag fashion (Figure 11g) [129]. Such periodic changes in the 2D structure as well as Tm were also
- revealed for 2,6-bisalkoxy-substituted anthraquinone derivatives within the alkyl chain length range of C7–C18 [133]. STM, in conjunction with DSC studies, suggested that the balance between hydrogen bonding and dispersion interactions co-regulates Tm. Other substitution effects, such as different
Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies
Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66
- (ζ) was measured by Doppler anemometry, and it was found to be around −13 mV. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were performed to determine the thermal stability and melting/recrystallization processes of the components after drug encapsulation. Overlaid DSC
- scanning calorimetry analysis Thermal analysis of BNZ, myristyl myristate, poloxamer 188, and NLC-BNZ was performed by differential scanning calorimetry (DSC Q2000, TA Instruments, New Castle, DE, USA) under an inert atmosphere of dry nitrogen (50 mL·min−1). A standard aluminum pan containing approximately
- tests. Statistical significance was set at p < 0.05. TEM image of NLC-BNZ. DSC thermograms of BNZ, myristyl myristate, poloxamer 188, NLC VEHICLE, and NLC-BNZ. Thermogravimetric (A) and derivative thermogravimetric (B) curves of BNZ, myristyl myristate, poloxamer 188, NLC-VEHICLE, and NLC-BNZ. ATR-FTIR
Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity
Beilstein J. Nanotechnol. 2023, 14, 781–792, doi:10.3762/bjnano.14.64
- , respectively, while those of AgNPs@Lac/Alg-0.7 were 4.09 ± 0.2 Å and 68.4 ± 0.8 Å3, respectively [43]. Thus, the XRD data provide evidence for the presence of AgNPs in the nanocomposites. To evaluate the thermal properties of the AgNPs@Lac/Alg nanocomposites, TGA and DSC measurements were performed on both the
- nanocomposite. DSC analysis revealed weakly exothermic peaks in the range of 150–300 °C, corresponding to the oxidation of organic components in the nanocomposites. The temperature peak for the blank sample was found at 248 °C, while for the nanocomposites AgNPs@Lac/Alg-0.3 and AgNPs@Lac/Alg-0.7, the peaks
- morphology of the nanocomposites was investigated using transmission electron microscopy (TEM) with a JEOL JEM-1400 instrument. Thermal analysis, including thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC), was conducted using a LabSys Evo 1600 thermal analyzer (SETARAM, France
Effects of drug concentration and PLGA addition on the properties of electrospun ampicillin trihydrate-loaded PLA nanofibers
Beilstein J. Nanotechnol. 2022, 13, 245–254, doi:10.3762/bjnano.13.19
- 125.58 °C specific to pure ampicillin trihydrate on the DSC thermograms of PLA, PLGA, PLA nanofibers, and PLA/PLGA nanofibers proves that ampicillin trihydrate was loaded in the nanofibers in an amorphous form. Mechanical properties of nanofibers The mechanical properties of nanofibers depend on their
- . Characterization of nanofibers Differential scanning calorimetry analysis Differential scanning calorimetry analysis thermograms of drug, polymer, and nanofibers were obtained using a differential scanning calorimeter (Shimadzu DSC-60, Kyoto, Japan). The samples were heated from 25 to 200 °C at a rate of 10 °C/min
- )]. Differential scanning calorimetry analysis (DSC) thermograms of ampicillin trihydrate, PLA, PLGA, PLA nanofibers, and PLA/PLGA nanofibers. PLA nanofibers prepared in the study. PLA/PLGA nanofibers prepared in the study. Mechanical properties of PLA nanofibers. Mechanical properties of PLA/PLGA nanofibers.
Electrical, electrochemical and structural studies of a chlorine-derived ionic liquid-based polymer gel electrolyte
Beilstein J. Nanotechnol. 2021, 12, 1252–1261, doi:10.3762/bjnano.12.92
- STIC, and Cochin University, Kerala, for DSC measurements.
Silver nanoparticles nucleated in NaOH-treated halloysite: a potential antimicrobial material
Beilstein J. Nanotechnol. 2021, 12, 798–807, doi:10.3762/bjnano.12.63
- . Transmission electron microscopy (TEM) was performed in a Jeol JEM-1400 plus (480 keV), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) in a Zeiss EVO MA15, and thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) in a simultaneous thermal analyzer
- and DSC analysis, from room temperature up to 600 °C, at constant heating of 20 °C/min. In order to observe the phases identified in the DSC/TGA measurements, four 10 g samples of HNT-8 were loaded with AgNO3 using the process described in section “Silver nanoparticle synthesis” and heated up to 65
- , 105, 230, and 505 °C. After that, TEM images were obtained to correlate morphological changes occurring during the synthesis with the thermodynamic data from DSC/TGA analysis. Finally, another 10 g of HNT-8 was loaded with AgNO3 and heated up to 700 °C, with visual inspections being performed at 40
Differences in surface chemistry of iron oxide nanoparticles result in different routes of internalization
Beilstein J. Nanotechnol. 2021, 12, 270–281, doi:10.3762/bjnano.12.22
- . Plasmid CLLCb-pEGFP was kindly provided by Prof. Ernst J. Ungewickell (Department of Cell Biology, Centre of Anatomy, Hannover Medical School, Germany) and vector pcDNA 3.1 (+) was kindly provided by Katarina Luciakova, DSc. (Cancer Research Institute, Biomedical Research Center SAS, Bratislava, Slovakia
Plant growth regulation by seed coating with films of alginate and auxin-intercalated layered double hydroxides
Beilstein J. Nanotechnol. 2020, 11, 1082–1091, doi:10.3762/bjnano.11.93
- agreement with a Zn/Al molar ratio of 2. Figure 2 shows the thermogravimetric analysis-differential scanning calorimetry (TG-DSC) and thermogravimetric analysis mass spectrometry (TG-MS) curves of ZnAl-NAA-LDH, which evidence three main steps of mass loss. The first step occurs from room temperature to 155
- analyses (TG-DSC-MS) were performed on a Netzsch thermoanalyzer model TGA/DSC 409 PC – Luxx coupled to an Aëolos 403 C mass spectrometer, using alumina crucibles and a heating rate of 10 °C/min under synthetic air flow of 50 cm3/min from ambient temperature up to 1000 °C. Surface area analysis was
- Tukey test with 5.0% significance. XRD patterns of (a) NAA and (b) ZnAl-NAA-LDH. (a) TG-DSC curves and (b) TG-MS curves of ZnAl-NAA-LDH. Nitrogen adsorption and desorption isotherms for ZnAl-NAA-LDH. Representative SEM images of (a) NAA (3000× magnification), (b) NAA (10000× magnification), (c) ZnAl-NAA
Poly(1-vinylimidazole) polyplexes as novel therapeutic gene carriers for lung cancer therapy
Beilstein J. Nanotechnol. 2020, 11, 354–369, doi:10.3762/bjnano.11.26
- nanoparticles and of the PVI–siRNA polyplex were recorded using differential scanning calorimetry (DSC, Polyma 214, Netzsch, Germany) in the temperature range of 0–300 °C in a nitrogen atmosphere at a scan rate of 5 °C·min−1. The samples were placed in an aluminium pan with lid, which also served as the
- investigated by using FTIR and DSC (Figure 2). The FTIR of PVI shows vibration bands at 2950 cm−1 (imidazole C–H stretching vibrations) and at 1645, 1506 and 1411 cm−1 (imidazole C–N stretching vibrations). The N–H in-plane bending vibrations are observed at 1235 cm−1. The polyplex also shows stretching
Size effects of graphene nanoplatelets on the properties of high-density polyethylene nanocomposites: morphological, thermal, electrical, and mechanical characterization
Beilstein J. Nanotechnol. 2020, 11, 167–179, doi:10.3762/bjnano.11.14
- each sample. Thermogravimetric analysis (TGA) of the samples was performed using a Q500 system from TA Company. TGA was carried out at a heating rate of 10 °C/min from room temperature to 700 °C under a nitrogen atmosphere. Differential scanning calorimetry (DSC) analysis was performed using a
- chemical composition of GnPs, as determined by XPS. DSC results for the HDPE/GnP nanocomposites. Results of the TGA analysis of the HDPE/GnP nanocomposites. Sizes of GnPs used in this study. Supporting Information Supporting Information File 90: FTIR spectroscopy and XRD patterns of HDPE/GnP
BergaCare SmartLipids: commercial lipophilic active concentrates for improved performance of dermal products
Beilstein J. Nanotechnol. 2019, 10, 2152–2162, doi:10.3762/bjnano.10.208
- loaded active agents, which can be measured by combining differential scanning calorimetry (DSC) with X-ray diffraction. Ruick showed a fast transition from the α modification to the β modification when SLNs were produced with tristearin (Figure 3), while a SmartLipids mixture with eight solid lipids
- is very easy by measuring the melting enthalpy using differential scanning calorimetry (DSC). The melting enthalpy of a SmartLipids suspension can be determined before addition to the product, after addition to a gel or a cream and after storage. In case the particles dissolve, e.g., in an oil of a
Nanoporous smartPearls for dermal application – Identification of optimal silica types and a scalable production process as prerequisites for marketed products
Beilstein J. Nanotechnol. 2019, 10, 1666–1678, doi:10.3762/bjnano.10.162
- fractions unless otherwise stated. Each loading for each type of silica was performed once. Differential scanning calorimetry (DSC) The physical state of the silica particles, the rutin raw active agent powder and the rutin smartPearls was investigated by differential scanning calorimetry (DSC, Mettler
- , larger pores and larger pore volume are easier to process on a large scale. Determination of amorphous-phase content The degree of amorphous phase of the loading was determined by performing DSC and XRD. An amount of 5% rutin in the physical mixture with amorphous unloaded silica was detectable by DSC
- . The analysis of the physical mixture of silica with crystalline rutin powder showed that an amount of only 3% crystalline rutin was clearly detectable by XRD, while 1.5% was hardly detectable (XRD not shown). Figure 3 shows the DSC thermograms for the maximum-loaded silica, SP53D, which was loaded
Warped graphitic layers generated by oxidation of fullerene extraction residue and its oxygen reduction catalytic activity
Beilstein J. Nanotechnol. 2019, 10, 1391–1400, doi:10.3762/bjnano.10.137
- ) Heat of O2-adsorption measured with a dynamic adsorption method using differential scanning calorimetry (DSC). (a) Cyclic voltammograms of the samples for the redox reaction ferricyanide/ferrocyanide (potential sweep rate = 5 mV/s). (b) Dependence of ΔEP on treatment time. (a) Oxygen reduction reaction
Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides
Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68
- , DSC, DMTA and melt rheology). Impressively a pronounced chain-extension effect for PBS was observed with both organo-modified LDHs, especially in the case of PBS–LDH/PHE, for which the apparent molecular weight was almost 400 times higher than the pristine PBS. Finally, PBS composites were subjected
- (DSC) using a Perkin-Elmer DSC6 apparatus. The analyses were carried out under nitrogen, and firstly, the samples (≈10 mg) were heated from 40–150 °C at 20 °C min−1, then kept at high temperature for 2 min, and then cooled down to −60 °C at 10 °C min−1. After that, the thermal history of the samples
- (PBS) to 83 and 82 °C for PBS–LDH/HIS and PBS–LDH/PHE, respectively. Small differences are also observed in Tg, but without a regular trend. However, Tg will be discussed further in the next paragraph, because DMTA is a more sensitive method to detect this. TGA and DSC traces for all nanocomposites are
Graphene–graphite hybrid epoxy composites with controllable workability for thermal management
Beilstein J. Nanotechnol. 2019, 10, 95–104, doi:10.3762/bjnano.10.9
- subsequently cured for 20 h at 80 °C. Thermal conductivity (TC) The TC of the matrix (TCmatrix) and of the composites (TCcomposite) was measured by differential scanning calorimetry (DSC, Mettler Toledo Star system operated under a N2 flow of 80 mL/min and equipped with 70 μL alumina crucibles) [24][25]. The
Electrolyte tuning in dye-sensitized solar cells with N-heterocyclic carbene (NHC) iron(II) sensitizers
Beilstein J. Nanotechnol. 2018, 9, 3069–3078, doi:10.3762/bjnano.9.285
- M), DSC performance depended on the ionic liquid with 1-ethyl-3-methylimidazolium hexafluoridophosphate (EMIMPF) > 1,2-dimethyl-3-propylimidazolium iodide (DMPII) > 1-butyl-3-methylimidazolium iodide (BMII) ≈ 1-butyl-3-methylimidazolium hexafluoridophosphate (BMIMPF). Omitting the MBI leads to a
- achieved giving η in the range of 0.47 to 0.57% which represents 7.8 to 9.3% relative to an N719 reference DSC set at 100%. Electrochemical impedance spectroscopy has been used to understand the role of the MBI additive in the electrolytes. Keywords: dye-sensitized solar cell; electrolyte; nanoparticles
- iron versus copper, the holy grail of sustainable DSCs is the use of iron-based sensitizers. Ferrere and Gregg [25] were the first to report of the use of a simple iron(II) sensitizer in a functional DSC; in the presence of the co-adsorbant chenodeoxycholic acid (cheno, Scheme 2), a DSC containing cis
Sulfur-, nitrogen- and platinum-doped titania thin films with high catalytic efficiency under visible-light illumination
Beilstein J. Nanotechnol. 2018, 9, 1629–1640, doi:10.3762/bjnano.9.155
- (ammonium nitrate, urea), sulfur (thiourea) and platinum (chloroplatinic acid), coated onto glass substrates by dip-coating, and thermally treated in a muffle furnace to promote crystallization. The resulting thin films were then characterized by various techniques (i.e., TGA-DSC-MS, XRD, BET, XPS, SEM
- dispersions [45]. The prepared samples were analyzed using thermogravimetric analysis–differential scanning calorimetry–mass spectrometry (TGA-DSC-MS), X-ray diffraction spectroscopy (XRD), specific surface area measurements via Brunauer–Emmett–Teller method (BET), X-ray photoelectron spectroscopy (XPS
- determined by XPS measurements. The platinum in sample S3_N0.5+0.015 M Pt was added as the final layer in the form of chloroplatinic acid by dip-coating. The last number describes molar concentrations of the deposited solution. Thermal analysis The purpose of thermal analysis measurements (TGA-DSC-MS) was to
Closed polymer containers based on phenylboronic esters of resorcinarenes
Beilstein J. Nanotechnol. 2018, 9, 1594–1601, doi:10.3762/bjnano.9.151
- ). The integrals of proton signals in the 1H NMR spectrum at 1.0–4.5 ppm indicate that p(SRA-B) contains one polystyrene unit per one SRA fragment, i.e., the polystyrene fraction is about 11 wt % of p(SRA-B). According to differential scanning calorimetry (DSC) data, p(SRA-B) is thermally more stable
- than SRA. The DSC curve of SRA exhibits two differential peaks at 100 and 310 °C. The first peak corresponds to water loss. The second one is the thermal decomposition of SRA. In contrast to SRA, the second small peak appears only at 400 °C in the DSC profile of p(SRA-B) (see Supporting Information
- pulsed gradient unit capable of producing magnetic-field pulse gradients in the z-direction of about 56 G/cm. D2O was used as solvent in all experiments. Chemical shifts were reported relative to H2O (δ = 4.7 ppm) as an internal standard. Measurements by the DSC and TGA methods were carried out with a
Induced smectic phase in binary mixtures of twist-bend nematogens
Beilstein J. Nanotechnol. 2018, 9, 1297–1307, doi:10.3762/bjnano.9.122
- , obtained by atomic force microscopy (AFM) imaging, is in the range of 6–7 nm. The induction of the smectic phase in the mixtures containing 55–80 mol % of BB was confirmed using polarising optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction. The origin of the
- modulations in NTB phase is extremely short, just about 6–7 nm. Results and Discussion Mesogenic properties of the pure compounds CBI and BB are presented in Table 1. The transition temperatures are determined by differential scanning calorimetry (DSC) and correspond to the data reported previously [16][18
- compounds and their mixtures were taken from the second DSC cooling run. This resulted in a slight lowering of the transition temperatures for the pure compounds comparable to the data obtained during the heating cycle (Table 1). The nature of the phase in various mixtures was identified by its
Formation and development of nanometer-sized cybotactic clusters in bent-core nematic liquid crystalline compounds
Beilstein J. Nanotechnol. 2018, 9, 1288–1296, doi:10.3762/bjnano.9.121
- cooling under quasi-equilibrium conditions at a rate of ≈1 K min−1, ΔH was taken from DSC upon cooling (10 K min−1). (a) Dielectric loss spectra (ε″) of a planar cell of cell thickness d = 7.8 µm in the frequency range 100 Hz–10 MHz and a temperature range of 60–120 °C. Measurements were carried out upon
P3HT:PCBM blend films phase diagram on the base of variable-temperature spectroscopic ellipsometry
Beilstein J. Nanotechnol. 2018, 9, 1108–1115, doi:10.3762/bjnano.9.102
- temperatures using a DSC 2920 apparatus (TA Instruments, Newcastle, DE, USA), with aluminum sample pans. Thermal characteristics of the samples were obtained under nitrogen atmosphere (gas flow = 50 mL/min). The instrument was calibrated with high-purity indium and gallium standards. DSC measurements have been
- all those thermal transitions we have performed DSC studies on powder materials (P3HT and PCBM) and on the P3HT:PCBM (1:1) film scrapped off a glass substrate. The results of the calorimetric measurements with a constant heating rate of 20 °C/min are shown in Figure 5. A modest number of
- for PCBM show Tg at 124.03 °C and two peaks of exothermic crystallization processes with maxima at 191.08 °C and at 265.44 °C. Also, the subsequent melting endotherm with a sharp minimum at 284.53 °C is visible. Having determined phase transitions from the DSC measurements, we return to our
Synthesis and characterization of two new TiO2-containing benzothiazole-based imine composites for organic device applications
Beilstein J. Nanotechnol. 2018, 9, 721–739, doi:10.3762/bjnano.9.67
- leaving only a broad halo at 4.6 Å. Both compounds were widely investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) to describe its thermal behavior taking into consideration the different symmetry of SP1 and SP2. POM images registered at heating and cooling for
- SP1 and SP2 are shown in Figure 5. Asymmetrical imine SP2 exhibited a higher melting point (mp 78.39 °C) than symmetrical SP1 (mp 66.31 °C). DSC curves of SP2 exhibited two peaks (see Figure 6), where the most intense one is attributed to the phase transition into isotropic liquid. However, the less
- intense peak at lower temperature is connected with the transition between two crystalline phases. For SP1 there is only one texture and one peak at 66.31 °C in the DSC curve on heating with the rate of 10 °C/min. Additionally, SP1 was measured during heating and cooling with increasing rates, because at
Photocatalytic and adsorption properties of TiO2-pillared montmorillonite obtained by hydrothermally activated intercalation of titanium polyhydroxo complexes
Beilstein J. Nanotechnol. 2018, 9, 364–378, doi:10.3762/bjnano.9.36
- close to the sol formation limit. The materials, produced at various annealing temperatures from the intercalated samples, were characterized by infrared spectroscopy, differential scanning calorimetry (DSC)/thermogravimetric analysis (TGA), X-ray diffraction, dynamic light scattering (DLS) measurements
- titanium dioxide. The results of a synchronous (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)) thermal analysis of the samples are shown in Figure 4. As seen in Figure 4, the MM, Ti-MM and Ti-MMH samples yield similar thermogravimetric curves, in which the loss of mass for
- analysis (TGA)/differential scanning calorimetry (DSC) curves of the raw MM, Ti-MM, and Ti-MMH. SEM images and EDS spectra of the surface of (a) TiO2-PMM500, and (b) TiO2-PMMH500. Nitrogen adsorption/desorption isotherms (а) and pore size distribution (b) of the raw MM, TiO2-PMMx, and TiO2-PMMHx. Kinetic
Design of polar self-assembling lactic acid derivatives possessing submicrometre helical pitch
Beilstein J. Nanotechnol. 2018, 9, 333–341, doi:10.3762/bjnano.9.33
- studied compounds KL n/m are summarised in Table 1. The differential scanning calorimetry (DSC) heating/cooling runs of two selected compounds, as examples, are presented in Figure 1. All compounds exhibit broad temperature ranges of the orthogonal paraelectric SmA* (up to 100 K) and tilted ferroelectric
- improved by electric field action in the frequency range of 10–20 Hz and an amplitude of 40 kV·cm−1, applied for about 5–20 min while cooling from orthogonal to tilted smectic phase. The samples, hermetically sealed in aluminium pans of 3–5 mg, were used for DSC studies. Mesomorphic properties For all
- control, which enabled temperature stabilisation within ±0.1 K. The phase transition temperatures were checked by DSC (Perkin-Elmer DSC 8000) on cooling/heating runs at a rate of 5 K·min−1 in a nitrogen atmosphere. The temperature and enthalpy change values were calibrated on the extrapolated onset
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