Опубликована: Янв. 1, 2024
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер 36(21)
Опубликована: Янв. 18, 2024
Abstract Dielectrophoresis (DEP) particle separation has label‐free, well‐controllable, and low‐damage merits. Sidewall microelectrodes made of liquid metal alloy (LMA) inherits the additional advantage thick electrodes to generate impactful DEP force. However, existing LMA electrode‐based devices lack ability integrate large‐array in a compact footprint, severely limiting flow rate thus throughput. Herein, facile versatile method is proposed high‐density microfluidic devices, taking passive control capillary burst valves (CBVs). CBVs with carefully designed pressures are co‐designed channels, allowing self‐assembly electrode array through simple hand‐push injection. The arrayed configuration brings accumulative deflection effect. Specifically, fabricated 5000 pairs sidewall chip demonstrted achieve ten times higher throughput deflection. 5000‐electrode‐pair device applied successfully separate four mixed samples, including human peripheral blood mononuclear cells A549 70 µL min −1 . It envisioned that this work can greatly facilitate fabrication offer robust platform for applications.
Язык: Английский
Процитировано
38
Small, Год журнала: 2024, Номер 20(26)
Опубликована: Март 14, 2024
Abstract Single‐cell mass spectrometry (MS) is significant in biochemical analysis and holds great potential biomedical applications. Efficient sample preparation like sorting (i.e., separating target cells from the mixed population) desalting moving off non‐volatile salt solution) urgently required single‐cell MS. However, traditional methods suffer complicated operation with various apparatus, or insufficient performance. Herein, a one‐step strategy by leveraging label‐free impedance flow cytometry (IFC) based microfluidics proposed. Specifically, IFC framework to characterize sort single‐cells adopted. Simultaneously sorting, cell transferred local high‐salinity buffer MS‐compatible solution. In this way, are achieved collected can be directly fed for MS analysis. A high efficiency (>99%), cancer purity (≈87%), whole workflow of impedance‐based separation normal (MCF‐10A) (MDA‐MB‐468) verified. As standalone module, microfluidic chip compatible variety methods, envisioned provide new paradigm efficient preparation, further multi‐modal electrical metabolic) characterization single‐cells.
Язык: Английский
Процитировано
35
Small, Год журнала: 2023, Номер 19(45)
Опубликована: Июль 12, 2023
Abstract Reflecting various physiological states and phenotypes of single cells, intrinsic biophysical characteristics (e.g., mechanical electrical properties) are reliable important, label‐free biomarkers for characterizing cells. However, single‐modal or properties alone not specific enough to characterize cells accurately, it has been long challenging couple the conventionally image‐based characterization impedance‐based characterization. In this work, spatial‐temporal impedance sensing signal leveraged, an multimodal electrical‐mechanical flow cytometry framework on‐the‐fly high‐dimensional measurement is proposed, that is, Young's modulus E , fluidity β radius r cytoplasm conductivity σ i membrane capacitance C sm With characterization, can better reveal difference in cell types, demonstrated by experimental results with three types cancer (HepG2, MCF‐7, MDA‐MB‐468) 93.4% classification accuracy pharmacological perturbations cytoskeleton (fixed Cytochalasin B treated cells) 95.1% accuracy. It envisioned provides a new perspective accurate single‐cell
Язык: Английский
Процитировано
34
Lab on a Chip, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Integration of low-frequency electrical impedance and broadband electromagnetic sensing with microfluidic devices enables high-throughput analysis cell size, membrane properties, intracellular characteristics.
Язык: Английский
Процитировано
1
Microsystems & Nanoengineering, Год журнала: 2024, Номер 10(1)
Опубликована: Янв. 29, 2024
This paper presents the design of a vision-based automated robotic microinjection system for batch injection both zebrafish embryos and larvae. A novel visual recognition algorithm based on an automatic threshold excessive dilatation is introduced to accurately identify center larval yolks. corresponding software developed using producer-consumer model as framework structure, friendly user interface designed allow operators choose from range desired functions according their different needs. In addition, microstructural agarose device fabricated simultaneously immobilize mixed batches Moreover, prototype by integrating hardware devices with algorithms. An experimental study conducted verify performance system. The results show that reported can larvae efficiently complete tasks mixtures success rate 92.05% in 13.88 s per sample. Compared manual existing systems, proposed demonstrates merits versatility, excellent efficiency, high rate, survival sufficient stability.
Язык: Английский
Процитировано
6
Analytical Chemistry, Год журнала: 2024, Номер 96(11), С. 4419 - 4429
Опубликована: Март 6, 2024
Impedance flow cytometry (IFC) has been demonstrated to be an efficient tool for label-free bacterial investigation obtain the electrical properties in real time. However, accurate differentiation of different species bacteria by IFC technology remains a challenge owing insignificant differences data. Here, we developed convolutional neural networks (ConvNet) deep learning approach enhance accuracy and efficiency toward distinguishing various bacteria. First, more than 1 million sets impedance data (comprising 42 characteristic features each set) groups were trained ConvNet model. To improve analysis, Spearman correlation coefficient mean decrease random forest algorithm introduced eliminate feature interaction extract opacity related wall membrane structure as predominant differentiation. Moreover, 25 optimized selected with accuracies >96% three (bacilli, cocci, vibrio) >95% two bacilli (Escherichia coli Salmonella enteritidis), compared machine algorithms (complex tree, linear discriminant, K-nearest neighbor algorithms) maximum 76.4%. Furthermore, was achieved on spiked samples mixing ratios. The proposed learning-assisted analysis method exhibits advantages analyzing huge number capacity extracting within multicomponent information will bring about progress advances fields both biosensing analysis.
Язык: Английский
Процитировано
6
Biosensors, Год журнала: 2025, Номер 15(3), С. 131 - 131
Опубликована: Фев. 21, 2025
Plant pathogen zoospores play a vital role in the transmission of several significant plant diseases, with their early detection being important for effective management. Current methods involve labour-intensive specimen collection and laboratory testing, lacking real-time feedback capabilities. Methods that can be deployed field remotely addressed are required. In this study, we have developed an innovative zoospore-sensing device by combining microfluidic sampling system cytometer incorporating chemotactic response as means to selectively detect motile spores. Spores Phytophthora cactorum were guided swim up channel following gradient attractant. They then detected transient change impedance when they passed between pair electrodes. Single-zoospore was demonstrated signal-to-noise ratios ~17 carrying flow used ~5.9 induced into attractants. This work provides solution selective, sensitive zoospores. It has great potential further portable, addressable, low-cost sensing system, offering tool applications.
Язык: Английский
Процитировано
0
Lab on a Chip, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
The use of the intrinsic electrical properties a single cell by broadband impedance spectroscopy (EIS) as label-free and non-invasive method to monitor cellular intracellular features is an emerging field. Here, we present novel EIS-based sheathless microfluidic platform with integrated coplanar waveguide probe interior cell. This allows for precise single-cell trapping dielectrophoresis, hydrodynamic focusing, sensing trapped We measured characteristics Schizosaccharomyces pombe (fission) yeast frequency sweep (30 kHz 6GHz) in stagnant sucrose solution using two-port scattering (S) parameters. measurements revealed clear distinction between cytoplasm live versus dead cells at 3 GHz. could provide real-time monitoring responses chemical physical antagonists diagnostic purposes.
Язык: Английский
Процитировано
0
Micromachines, Год журнала: 2025, Номер 16(6), С. 683 - 683
Опубликована: Июнь 5, 2025
Under the dual drivers of precision medicine development and health monitoring demands, real-time biosensing technologies has emerged as a key breakthrough in field life science analytics. Microfluidic impedance detection technology, achieved through integration microscale fluid manipulation bioimpedance spectrum analysis, enabled biological samples ranging from single cells to organ-level systems, now standing at forefront research. This review systematically summarizes core principles microfluidic modeling methods for cell equivalent circuits, system optimization strategies, recent research advancements applications. We first elucidate fundamental technologies, followed by comprehensive analysis cellular circuit model construction design strategies. Subsequently, we categorize applications based on sample types, elaborating respective progress existing challenges. concludes with prospective insights into future developmental trajectories. hope this work will provide novel perspectives advancing technology while stimulating interdisciplinary collaboration among researchers biology, medicine, chemistry, physics propel technological innovation collectively.
Язык: Английский
Процитировано
0
Analytical Methods, Год журнала: 2024, Номер 16(32), С. 5509 - 5518
Опубликована: Янв. 1, 2024
This review introduces various studies on cell-sized liposomes, which facilitate observation for the rapid detection and analysis of diverse materials based their size, dynamic shape changes, phase separation, providing valuable insights.
Язык: Английский
Процитировано
1