Jacek Gosciniak’s Post

I am pleased to announce our paper, entitled "Dynamic behavior of floating magnetic liquid marbles under steady and pulse-width-modulated magnetic fields", has been recently published in the esteemed journal of Lab on a Chip. In our research, we explore the potential of liquid marbles, specifically biocompatible magnetic liquid marbles with magnetic shells (LMMS), for digital microfluidic devices. We experimentally investigate the movement of LMMS on water surfaces under the influence of DC and pulse width modulation (PWM) magnetic fields. Our findings reveal that the PWM magnetic field offers superior control over LMMS manipulation by providing step-by-step movement. This research paves the way for innovative applications in biomedicine, microfluidics, and beyond by leveraging the unique properties of LMMS. #LabOnAChip #Microfluidics #DigitalMicrofluidics #MicroTAS #Research #Paper

I am pleased to announce that our paper entitled "Dynamic behavior of floating magnetic liquid marbles under steady and pulse-width-modulated magnetic fields" has been published in the prestigious Lab on a Chip journal (Royal Society of Chemistry). In our research, we explore the potential of liquid marbles, specifically biocompatible magnetic liquid marbles with magnetic shells (LMMS), for digital microfluidic devices. We experimentally investigate the movement of LMMS on water surfaces under the influence of DC and pulse width modulation (PWM) magnetic fields. Our findings reveal that the PWM magnetic field offers superior control over LMMS manipulation by providing step-by-step movement. This research paves the way for innovative applications in biomedicine, microfluidics, and beyond by leveraging the unique properties of LMMS. I extend my heartfelt gratitude to my co-author, Mr. hossein dayyani for his invaluable collaboration, and to our supervisor, Dr. Mohamad Ali Bijarchi, for his unwavering support and guidance throughout this journey. #LabOnAChip #Microfluidics #DigitalMicrofluidics #MicroTAS #Magnetic #Research

Our latest paper, "Enhancing Lateral Transport in Microfluidic Devices with Bulk Acoustic Wave (BAW) Mixing," has been published. Lateral flow membrane microdevices are essential for chromatographic separation and diagnostic processes. However, their efficiency is often hindered by mass transfer limitations in the membrane and liquid phase. To address this, we present a novel approach using active Bulk Acoustic Wave (BAW) mixing to enhance lateral transport in micromachined silicon devices. Highlights of this work: 🔹 We leveraged BAWs, previously used for mixing and trapping cells in single channels, for the first time in membrane devices. 🔹 Optimized Resonance achieved with minimal influence from pore configuration. 🔹 A roughened (black silicon) wall enhances average streaming flow in BAW mode by threefold, highlighting potential for further optimization. Our findings open new avenues for the design and optimization of microfluidic devices, paving the way for more efficient and effective separation processes. Link to the full paper: https://lnkd.in/eDDGG5bg Feel free to reach out for discussions 😉 ! #Microfluidics #BAWmixing #MembraneDevices #ResearchInnovation

On-chip light sources based on hybrid integration of colloidal semiconductor nanocrystal emitters with integrated photonics have focused on either colloidal emitters ill-suited to act as gain media due to large Auger recombination or nonscalable suspended nanocavity geometries with a randomly positioned colloidal gain material. In this work published in ACS Photonics, we demonstrate a nanolaser by integrating colloidal quantum wells with an on-substrate nanobeam cavity geometry. We employ deterministic positioning of colloidal quantum wells to enhance the coupling of the gain material to the cavity. This device achieves lasing under continuous-wave optical pumping at room temperature with a threshold of 2.9 μW, which demonstrates the suitability of this hybrid platform for scalable on-chip light sources. Additionally, we show that the shelling of the colloidal quantum wells is essential for maximizing gain. Here is the paper: https://lnkd.in/gjqAmcb6

I am pleased to announce that my paper entitled “Hysteresis impact of ferroelectric oxide on double-source vertical tunnel FET: DC and RF performance” has been published in the European Physical Journal Plus journal and is now accessible online. The work presents a detailed TCAD investigation of the double-source vertical junction tunneling field-effect transistor by ferroelectric gate oxide material. We show that the ferroelectric oxide (Si: HfO2) improves the efficiency of the FE-DSV-TFET structure. The proposed device reduces the subthreshold swing from 13.2 to 6.2 mV/dec. Also, OFF-current decreases ~ 2.5 orders, and ON-current increases from 100 to 200 µA/µm in the FE-DSV-TFET. Besides, we investigate the hysteresis impact of coercive field (EC) and remnant polarization (Pr) compared to DSV-TFET. https://lnkd.in/gR3reTn7

Another nice article on chiral phonons. At room temperature, materials with chiral phonons exhibit the Seebeck effect (current induced by temperature gradients). This spin current can be induced/controlled by using temperature gradients through nonmagnetic materials that can lead to investigation of a new class of substrate materials for electronic devices. https://lnkd.in/gTkpEutV

💠 Rescheduled Webinar - Beyond Chemical Composition Part II: Best Practices for Optimizing LEIPS, UPS, and REELS Experiments 📆 Oct. 22 at 10 am CST In Part 2 of this webinar series, James Johns will continue the discussion of three of these techniques available on PHI XPS products: Ultraviolet Photoemission Spectroscopy (#UPS), Low Energy Inverse Photoemission Spectroscopy (#LEIPS), and Reflection Electron Energy Loss Spectroscopy (#REELS). UPS and LEIPS are powerful techniques for measuring the occupied valence and unoccupied conduction electronic bands of a material/surface, including beam-sensitive materials that can be damaged by other conventional methods. REELS, meanwhile, uses an electron beam to probe the optical excitations that can happen at a surface, and additionally is capable of measuring hydrogen content. Register today: https://lnkd.in/gvefPV5q More information on the webinar https://lnkd.in/gEri-tFU #webinar #xps #haxpes #innovation #research #researchanddevelopment

Researchers from UC San Diego have developed an innovative approach to #multispectral #photodetection by alternating layers of #graphene and #colloidal #QuantumDots. By carefully engineering the material stack, the researchers created #photodetectors sensitive to different wavelength bands without additional #optical components. The key innovation lies in using graphene monolayers as independent charge collectors at different depths within a quantum dot absorber layer. https://lnkd.in/eu3zxKkE (Work funded by the National Science Foundation (NSF) and the United States Department of Defense)

The #PolySense and Polysense Innovations teams have just published a new article on Photoacoustics Journal Elsevier (IF 7.9) reporting on an all-fiber-based laser gas analyzer (LGA) employing quartz-enhanced photoacoustics spectroscopy (QEPAS) and a side-polished fiber (SPF). Sensor performance was demonstrated using methane in nitrogen gas mixtures, with CH4 mixing ratios ranging from 75 ppmv to 1% (by volume), measured with an accumulation time of 300 ms, and a minimum detection limit of 34 ppmv subsequently determined. The EW-QEPAS sensor is ideal for miniaturization, as it does not contain any free-space optics and is suitable for gas sensing in harsh environments and where mobility is required. The following link provides access to the article: https://lnkd.in/dzFt4vw7