Temperature Dependence of Sorption

Shimizu, Seishi; Matubayasi, Nobuyuki

doi:10.1021/acs.langmuir.1c01576

Cited by 22 publications

(33 citation statements)

References 72 publications

(221 reference statements)

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“…Results also showed that mean binding of the capture peptides at 4 h at room temperature was not significantly different compared to 16 h binding. However, mean binding for 4 h at 4 °C was significantly different to 16 h. This difference most likely dependent on variations in absorption kinetics at different temperatures for CH2 domain 32 . Overall, the results support the idea that the capture peptides can be easily attached to textiles, such as during routine laundry cycles 33 , 34 .…”

Section: Resultsmentioning

confidence: 83%

Bioengineered textiles with peptide binders that capture SARS-CoV-2 viral particles

et al. 2022

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The use of personal protective equipment (PPE), face masks and ventilation are key strategies to control the transmission of respiratory viruses. However, most PPE provides physical protection that only partially prevents the transmission of viral particles. Here, we develop textiles with integrated peptide binders that capture viral particles. We fuse peptides capable of binding the receptor domain of the spike protein on the SARS-CoV-2 capsid to the cellulose-binding domain from the Trichoderma reesei cellobiohydrolase II protein. The hybrid peptides can be attached to the cellulose fibres in cotton and capture SARS-CoV-2 viral particles with high affinity. The resulting bioengineered cotton captures 114,000 infective virus particles per cm2 and reduces onwards SARS-CoV-2 infection of cells by 500-fold. The hybrid peptides could be easily modified to capture and control the spread of other infectious pathogens or for attachment to different materials. We anticipate the use of bioengineered protective textiles in PPE, facemasks, ventilation, and furnishings will provide additional protection to the airborne or fomite transmission of viruses.

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Section: Resultsmentioning

confidence: 83%

Bioengineered textiles with peptide binders that capture SARS-CoV-2 viral particles

et al. 2022

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“…(This is reminiscent of the previous attempts to relate the Kirkwood–Buff approach to the hydration shell/bulk partition coefficient defined under hydration shell model and accessible surface area In this context, K I (0) is exponentially related to the free energy of sorption; whether this free energy is dominated by the energy or entropy can be revealed by the temperature dependence of an isotherm …”

Section: Resultsmentioning

confidence: 98%

Understanding Sorption Mechanisms Directly from Isotherms

Shimizu

Matubayasi

2023

Langmuir

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Currently, more than 100 isotherm models coexist for the six IUPAC isotherm types. However, no mechanistic insights can be reached when several models, each claiming a different mechanism, fit an experimental isotherm equally well. More frequently, popular isotherm models [such as the site-specific models like Langmuir, Brunauer–Emmett–Teller (BET), and Guggenheim–Anderson–de Boer (GAB)] have been applied to real and complex systems that break their basic assumptions. To overcome such conundrums, we establish a universal approach to model all isotherm types, attributing the difference to the sorbate–sorbate and sorbate–surface interactions in a systematic manner. We have generalized the language of the traditional sorption models (such as the monolayer capacity and the BET constant) to the model-free concepts of partitioning and association coefficients that can be applied across the isotherm types. Through such a generalization, the apparent contradictions, caused by applying the site-specific models alongside with cross-sectional area of sorbates for the purpose of surface area determination, can be eliminated straightforwardly.

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“…Then, the second layer of N 2 molecules starts to gradually form, through the interaction with the already adsorbed molecules of the first layer. The condensation process is cooperative, [ 43,44 ] as shown by the third and further layers easily forming on the second one before it is saturated, which is reflected by the marked inflection of the adsorption isotherm.…”

Section: Resultsmentioning

confidence: 99%

Experiments‐Guided Modeling of MCM‐41: Impact of Pore Symmetry on Gas Adsorption

Carta

Cara

Cannas

et al. 2022

Adv Materials Inter

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by combining sol-gel synthesis with a proper surfactant templating agent. The latter was not a single solvated organic or inorganic species, but a self-assembled surfactant array. Three main mesophases are typically produced, namely, the cubic MCM-48, the lamellar MCM-50, and the hexagonal MCM-41. The latter is characterized by a regular 2D hexagonal array (P6mm space group symmetry) of highly uniform parallel non-interconnected channels, with the pore diameter depending on the specific templating agent. Compared to the other members of the M41S mesoporous family, MCM-41 has a higher thermal stability, and it is easier to prepare, thus attracting greater attention. [1,12] The ordered pore architecture of MCM-41 can be clearly observed through transmission electron microscopy (TEM) [2,13] and assessed through low-angle X-ray diffraction (LA-XRD) techniques or small-angle x-ray scattering (SAXS). [2] Overall, porosity can be as high as 80%, with the pore walls composed of amorphous silica. [1] The analysis of the N 2 adsorption isotherms according to the Brunauer-Emmett-Teller (BET) theory [14] is widely employed to estimate the Specific Surface Area (SSA), which is typically >700 m 2 g -1 . [11] Analysis of the same adsorption isotherm through the Barrett-Joyner-Halenda (BJH) model [15] is the typical choice to determine the pore size distribution (PSD). However, other approaches are available to retrieve these textural details, which are more recent and have a more rigorous physical base, such as the Density Functional Theory (DFT), allowing the determination of both the SSA, the pore volume, and the PSD. [16] The former models and theories have been recently questioned. [17] Computer calculations and simulations are able to unveil the microscopic details and the energetic aspects of the interaction between the guest molecules and the solid surface. Adsorption capacity, selectivity, diffusivity, and so on, can be investigated at the microscopic level under different pressure, temperature and humidity, so to obtain fundamental information to tailor material synthesis and functionalization to meet specific goals. Computational approaches can be used to complement the experiments, but also to possibly predict the system behavior, and to save time and resources on the laboratory bench. To this aim, the preparation of a 3D model that matches the characteristics of the real sample and that is able to reproduce the macroscopic behavior, as seen by the experiments, is crucial. Mesoporous materials cannot be modeled as simple flat surfaces or slits. At Among mesoporous ordered silica-based materials, MCM-41 is widely employed in both experimental and computational investigations of gas adsorption. Specific surface area and pore size distribution are typically obtained by analyzing the N 2 adsorption isotherm. To this aim, different models and theories are available, and which one is more accurate is under debate. On the computational side, the in silico model ought to match the characteristics of real samples and reproduc...

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Temperature Dependence of Sorption

Cited by 22 publications

References 72 publications

Bioengineered textiles with peptide binders that capture SARS-CoV-2 viral particles

Bioengineered textiles with peptide binders that capture SARS-CoV-2 viral particles

Understanding Sorption Mechanisms Directly from Isotherms

Experiments‐Guided Modeling of MCM‐41: Impact of Pore Symmetry on Gas Adsorption

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