Strain relaxation and multidentate anchoring in n-type perovskite transistors and logic circuits

This is the author accepted manuscriptData availability: Source data are provided with this paper. Additional data related to this work are available from the corresponding authors upon request.Code availability statement: All codes (software) used in the calculation and visualization are publicly available and the condition of their usage in the publication is an appropriate citation.The engineering of tin halide perovskites has led to the development of p-type transistors with field-effect mobilities of over 70 cm2 V-1 s-1 . However, due to their background hole doping, these perovskites are not suitable for n-type transistors. Ambipolar lead halide perovskites are potential candidates, but their defective nature limits electron mobilities to around 3-4 cm2 V-1 s-1, which makes the development all-perovskite logical circuits challenging. Here, we report formamidinium lead iodide perovskite n-type transistors with field-effect mobilities of up to 33 cm2 V-1s-1 measured in continuous bias mode. This is achieved through strain relaxation of the perovskite lattice using a methyl ammonium chloride additive, followed by suppression of undercoordinated lead through tetramethyl ammonium fluoride multidentate anchoring. Our approach stabilizes the alpha phase, balances strain, and improves surface morphology, crystallinity, and orientation. It also enables low-defect perovskite–dielectric interfaces. We use 46 the transistors to fabricate unipolar inverters and eleven-stage ring oscillator

The nucleoporin ALADIN regulates Aurora A localization to ensure robust mitotic spindle formation

The formation of the mitotic spindle is a complex process that requires massive cellular reorganization. Regulation by mitotic kinases controls this entire process. One of these mitotic controllers is Aurora A kinase, which is itself highly regulated. In this study, we show that the nuclear pore protein ALADIN is a novel spatial regulator of Aurora A. Without ALADIN, Aurora A spreads from centrosomes onto spindle microtubules, which affects the distribution of a subset of microtubule regulators and slows spindle assembly and chromosome alignment. ALADIN interacts with inactive Aurora A and is recruited to the spindle pole after Aurora A inhibition. Of interest, mutations in ALADIN cause triple A syndrome. We find that some of the mitotic phenotypes that we observe after ALADIN depletion also occur in cells from triple A syndrome patients, which raises the possibility that mitotic errors may underlie part of the etiology of this syndrome

A three-step healing approach for high performance n-channel perovskite transistors and logical circuits

This is the author accepted manuscript.Data availability: The data that support the findings of this study are available from the corresponding authors upon reasonable request.Code availability statement: All codes (software) used in the calculation and visualization are publicly available and the condition of their usage in publication is an appropriate citation.Progress in all-inorganic tin halide perovskites has recently enabled the fabrication of p-channel transistors with mobilities exceeding 50 cm2 V-1 s-1. However, the performance of the n-channel counterparts is currently limited to 4 cm2 V-1 s-1, undermining efforts to realize all-perovskite logical circuits. Herein, we report n-channel hysteresis-free perovskite transistors with electron mobilities of 25.15 cm2 V−1 s−1 combined with exceptional stability upon continuous bias stress. This is achieved through the application of a rational three-step healing approach, consisting of: (i) the addition of methyl ammonium chloride to stabilize the alpha-phase of formamidinium lead iodide; (ii) dilution with tetrahydrofuran to substantially improve the morphology of the perovskite channel; and (iii) surface treatment with tetramethylammonium hexafluorophosphate to further reduce the concentration of ionic bulk and surface defects. Upon applying a short post-annealing of the surface modifier, an unprecedented mobility of 33 cm2 V−1 s−1 is further attained. These transistors are integrated to fabricate unipolar inverters and eleven-stage ring oscillators, paving the path towards all-perovskite logical circuits.Korea Research Foundatio

Optimization of parameters for obtaining surimi-like material from mechanically separated chicken meat using response surface methodology

Surimi is a semi-processed washed fish mince protein concentrate mixed with cryoprotectants for frozen storage, which is the primary constituent of processed foods. Mechanically separated chicken meat (MSCM) is a common ingredient of comminuted sausages mainly due to its low price. The present work aimed to define the adequate parameters to obtain surimi-like material from MSCM using response surface methodology, and to characterize the chemical and textural properties of this product. The MSCM was utilized in the elaboration of surimi-like material using the bleaching method with sodium bicarbonate and sodium chloride solutions. For this purpose, the effect of process parameters viz: temperature (T=2, 7, and 12 °C), time (t=5, 10, and 15 min/cycles) and washing solution: MSCM ratio (R=2:1, 4:1, and 6:1w/w) were evaluated using response surface methodology. The highest composite design averages obtained were 10.7 % for protein content, 1,003.4 g for breaking force, 645.8 g.cm for gel strength, 9.0 N for cutting strength, and 24.1 N.s for work of shearing at the optimum combination of processing conditions of 7 °C, 10 min and 4:1 washing solution:MSCM ratio, corresponding to the central points of the proposed experimental design. The obtained models had high determination coefficients, explaining 95.85, 98.23, 98.41, and 96.08%of total variability in protein content, cutting strength, breaking force, and work of shearing variabilities, respectively. According to the folding test the surimi-like material presented the same characteristics of a high quality surimi (FT=5)