2 research outputs found
The Role of MXene Surface Terminations on Peptide Transportation in Nanopore Sensing
Nanopores with two-dimensional materials
have various
advantages
in sensing, but the fast translocation of molecules hinders their
scale-up applications. In this work, we investigate the influence
of −F, −O, and −OH surface terminations on the
translocation of peptides through MXene nanopores. We find that the
longest dwell time always occurs when peptides pass through the Ti3C2O2 nanopores. This elongated dwell
time is induced by the strongest interaction between peptides and
the Ti3C2O2 membrane, in which the
van der Waals interactions dominate. Compared to the other two MXene
nanopores, the braking effect is indicated during the whole translocation
process, which evidence the advantage of Ti3C2O2 in nanopore sensing. Our work demonstrates that membrane
surface chemistry has a great influence on the translocation of peptides,
which can be introduced in the design of nanopores for a better performance
Transport and Thermodynamic Properties of KFSI in TEP by Operando Raman Gradient Analysis
Understanding and
characterizing the transport and thermodynamic
properties of electrolytes are critical for optimizing battery performance.
In this study, we employ operando Raman gradient analysis (ORGA) to
characterize the concentration-dependent diffusion coefficient, transference
number, ionic conductivity, and thermodynamic factor of potassium
bis(fluorosulfonyl)imide (KFSI) in triethyl phosphate (TEP), an ideal
model system and one of the most promising K-ion battery electrolytes.
ORGA demonstrates results consistent with conventional state-of-the-art
methods while proving to be significantly more electrolyte- and time-efficient.
Additionally, we probe, for the first time, the concentration-dependent
transport and thermodynamic properties of KFSI-TEP, providing key
parameters for K-ion battery modeling