Article
Chemistry, Multidisciplinary
Ethan B. Secor, Nelson S. Bell, Monica Presiliana Romero, Rebecca R. Tafoya, Thao H. Nguyen, Timothy J. Boyle
Summary: An alternative method based on air-stable nanoscale metal hydrides for conductive inks was presented, with successful printing of conductive patterns on polyimide achieved. TiH2 nanoparticles produced by specific processing steps enabled the preparation of high-resolution conductive patterns.
Article
Engineering, Manufacturing
D. R. Hines, Y. Gu, A. A. Martin, P. Li, J. Fleischer, A. Clough-Paez, G. Stackhouse, A. Dasgupta, S. Das
Summary: Additive manufacturing methods are increasingly used for fabricating electronic circuits, with aerosol-jet printing emerging as a promising technique. In order to achieve a more mature aerosol-jet printing methodology, careful control of trace width, ink deposition rate, scale factor, and print speed is essential.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Environmental
Nuno P. F. Goncalves, Eduardo Ferreira da Silva, Luis A. C. Tarelho, Joao A. Labrincha, Rui M. Novais
Summary: This study reports the use of highly porous 3D-printed sorbents containing red mud, a hazardous waste from the alumina industry, for the remediation of acid mine drainage (AMD). The sorbents showed high adsorption capacity for multiple metal elements and were successfully regenerated for reuse, providing a new solution for managing hazardous AMD.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Chemistry, Analytical
L. Vigna, A. Verna, S. L. Marasso, M. Sangermano, P. D'Angelo, F. C. Pirri, M. Cocuzza
Summary: The study demonstrates that gas sensors using PEDOT:PSS with post-treatments of H2SO4 and MeOH can improve gas sensing performance, with MeOH treatment showing the best response towards ammonia and NO2. Long-term stability and temperature have minimal impact on the sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Multidisciplinary Sciences
Sen Chen, Jing Liu
Summary: Liquid metal printed electronics (LMPE) offers advantages like large-area printing, flexibility, and low cost. By customizing electronic products, it can reshape the modern electronics and integrated circuits field.
Article
Materials Science, Ceramics
Haibing Li, Huimin Zhang, Feng Li, Aimin Chang, Hua Zhuo
Summary: Mn1.95Co0.21Ni0.84O4-core@LaMnO3-shell microbeads were synthesized using ink-jet printing. The impact of LaMnO3 composition on the electrical properties was investigated. X-ray diffraction revealed a composition mainly composed of cubic spinel NiMn2O4 and rhombohedral perovskite LaMnO3. X-ray photoelectron spectroscopy confirmed ion migration in the composite material. These ceramics exhibited negative temperature coefficients and had low aging coefficients compared to uncoated microbeads.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Binghan Zhou, Zhuo Chen, Qian Cheng, Mingfei Xiao, Garam Bae, Dongfang Liang, Tawfique Hasan
Summary: The surface porosity of graphene-based aerogels plays a crucial role in applications involving mass transfer. Through experiments and simulations, it is found that high shear stress during the fabrication process leads to a non-porous surface, while crosslinking of the sheets results in a porous surface. Controlling the surface porosity of printed graphene-oxide aerogels (GOA) can be achieved by regulating the crosslinking agents and shear stress. The study demonstrates the performance advantages of GOA with porous surface in dye adsorption, highlighting the importance of surface porosity in specific applications.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Sangam Srikanth, Jaligam Murali Mohan, Sushil Raut, Satish Kumar Dubey, Idaku Ishii, Arshad Javed, Sanket Goel
Summary: In this study, a droplet based microfluidic electrochemical device was fabricated using inexpensive technique, which showed high throughput, low sample volumes, minimum cross contamination, lower energy demands, and shorter analysis times. The electrochemical detection of ascorbic acid was successfully implemented under specific conditions, such as lower flow rate and certain parameter settings.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Review
Materials Science, Multidisciplinary
Krishan Kumar, Reddicherla Umapathi, Sanjay Mor, Seyed Majid Ghoreishian, Jitendra N. Tiwari, Marzieh Ramezani Farani, Yun Suk Huh, Pannuru Venkatesu
Summary: Thermoresponsive polymers (TRPs) have attracted attention for their applications in various fields, such as sensors, gels, drug delivery devices, biotechnology, and pharmacology. Certain biomolecules can modify the phase transition behavior of TRPs as external biological stimuli. This review summarizes recent findings and trends in TRP/biomolecule mixed systems, focusing on protein-polymer assembly formation, interactions, and temperature-dependent protein adsorption. By responding to biomolecules present in the human body, modifying polymer properties allows for the design of polymeric biomaterials with potential applications. This review aims to address scientific issues related to biomolecule-polymer mixed systems and contribute to the development of next-generation smart polymers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Archaeology
Eva Bevk, Barbara Blaznik, Sabina Bra
Summary: Ink-jet printing is increasingly used, but the degradation of prints under light can cause problems. The study examined the lightfastness of ink-jet prints protected with glass. Different colors were printed on various substrates and exposed to xenon light. The results showed that glass effectively reduced photodegradation, with UV glass being more effective.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Materials Science, Coatings & Films
Jianan Song, Jia Huang, Zhilai Lu, Lu Qiu, Hongyu Qi, Zhibin Yan
Summary: The use of ink-jet printing in the production of film sensors for gas turbines has great potential. This study investigates the mechanical properties of ink-jet printed films with different thicknesses through indentation tests. Additionally, an anisotropic phase field fracture model is employed to simulate the deformation and cracking mechanisms of ink-jet films with different microstructures. The study emphasizes the evaluation of the accuracy of indentation tests for films with intricate structures, taking into account the effects of thickness and micro-void distributions. This research provides innovative insights into the structural-dependent failure mechanism of ink-jet films, offering a new perspective on the design of films with high mechanical strength.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Abdul Nasir, Yuaya Mikami, Rui Yatabe, Hiroaki Yoshioka, Nilesh Vasa, Yuji Oki
Summary: In this study, a microdisk laser was fabricated using a low-viscosity hyper branched polymer FC-V-50, and the first demonstration of label-free biosensing using this polymer-based microdisk laser was reported.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Jianan Song, Jia Huang, Lu Qiu
Summary: This study investigates the influence of printing parameters on the adhesion strength of ink-jet films, specifically indium tin oxide (ITO) and indium oxide (In2O3) films deposited on ceramic substrates. Different printing speeds and stack layers are considered. The study characterizes the surface morphology of the films and conducts microscratch tests to calculate the adhesion energy. The relationships between printing parameters, microstructures, and adhesion strength are emphasized, providing innovative insights into the mechanical properties of ink-jet printed films.
MATERIALS & DESIGN
(2023)
Article
Polymer Science
Golnaz Taghavi Pourian Azar, Sofya Danilova, Latha Krishnan, Yirij Fedutik, Andrew J. Cobley
Summary: The electroless copper plating of textiles is a promising method for producing high-reliability e-textiles, sensors, and wearable electronics. Optimizing the printing design, direction, and number of printing cycles can result in metallized patterns with desired conductivity, stiffness, and laundering durability.
Article
Engineering, Electrical & Electronic
Roman Sajapin, Davide Vurro, Pasquale D'Angelo, Giuseppe Tarabella, Simone L. Marasso, Matteo Cocuzza, Maddalena Botti, Mirko Buttrini, Adriana Calderaro, Tatiana Berzina, Salvatore Iannotta
Summary: This study presents a chitosan:polyaniline-based ink for the manufacturing of the first organic memristive device with an aerosol jet printed conductive channel. The ink is eco-biofriendly and suitable for emulating neuro-morphic functions in bioelectronics. The study demonstrates the potential of aerosol jet printing technology in flexible organic electronic devices.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Marine
Della Thomas, S. Surendran, Nilesh J. Vasa
Summary: This study focuses on the issue of ship hull fouling in tropical ocean environment, analyzing voyage data taking into account wind and wave conditions, calculating the design speed for various loading conditions, solving differential equations to obtain voyage time and distance, and relying on Granville's similarity law to calculate frictional resistance and loads due to wind and waves for ships with fouled hulls at design speed.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Physics, Applied
Tejaswi Josyula, Y. Esther Blesso Vidhya, Nilesh J. Vasa, Pallab Sinha Mahapatra, Arvind Pattamatta
Summary: Understanding the internal flow in evaporating sessile drops is crucial in various applications. This study reveals the nonaxisymmetric internal flow field caused by Marangoni flow at the liquid-vapor interface, and the transition to an axisymmetric toroidal flow during the evaporation process.
APPLIED PHYSICS LETTERS
(2022)
Article
Computer Science, Information Systems
G. Parvathy, Myneni Sukesh Babu, P. Sriram Karthick Raja, T. Thyagaraj, N. J. Vasa, R. Sarathi, Noureddine Harid, Huw Griffiths
Summary: The addition of lime to stabilize soil increases its strength and electrical properties, but pH and electrical conductivity decrease with longer curing periods. Analyzing mineralogical and micro-structural changes in the soil showed improvements in axial strength, plasma temperature, and electron number density with higher lime content and longer curing periods. Correlations between Ca II peaks in LIBS spectral data and lime content at different curing periods were successfully determined using PLSR technique with high accuracy.
Article
Engineering, Multidisciplinary
Pabbati Vinod, Myneni Sukesh Babu, Ramanujam Sarathi, Nilesh J. Vasa, Stefan Kornhuber
Summary: Silicone rubber insulators were studied for contamination level using laser-induced breakdown spectroscopy (LIBS) analysis, successfully identifying salt deposits on the surface even at far distances and any time. The normalized intensity ratio of sodium peaks was used to evaluate the salt deposit density accurately.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Optics
Sooraj Shiby, Nilesh J. Vasa
Summary: This study reports a method for pulsed laser-assisted micro-scribing of Cu from dielectric material, with monitoring using laser-induced breakdown spectroscopy (LIBS). Multiple laser scans were needed for complete Cu removal, and the Cu I line intensity in the LIBS spectra decreased as the microchannel depth increased. Additionally, characteristic emission lines from substrate elements were observed in the LIBS spectra during the final laser scan process.
OPTICS AND LASER TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
A. Raja, Srinivasa Rakesh Cheethirala, Pallavi Gupta, Nilesh J. Vasa, R. Jayaganthan
Summary: This article reviews the interrelationship between LPBF process parameters, microstructure, crack initiation, and crack growth mechanisms under fatigue loading conditions. It highlights the importance of standardizing mechanical testing techniques, specimen design guidelines, and post-manufacturing treatments for improving the fatigue resistance of AlSi10Mg alloy. The influence of microstructural features and post-processing conditions on fatigue properties is discussed, along with the crack growth mechanism observed in LPBF processed material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Hemalaxmi Rajavelu, Nilesh J. Vasa, Satyanarayanan Seshadri
Summary: This study proposed and demonstrated the feasibility of a fiber-based LIBS technique for analyzing pulverized coal. By replacing the air medium with a hollow-core fiber, high-power laser pulses were effectively delivered to the target for ablation with a transmission efficiency of 50-60%. The addition of the hollow-core fiber upgraded the conventional LIBS technique into a remote characterization unit, as proven by the captured LIBS spectra.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
S. Sooraj, Y. R. Yugandhara, N. J. Vasa, A. Kavitha, S. Krishnan, M. Shigeki
Summary: In this study, the micro-scribing process of the Cu film on a dielectric substrate was investigated using lasers with different pulse durations. It was observed that the formation of recast layer near the microchannel occurred when using lasers with pulse durations of 6 ns and 500 ps, while no recast layer was observed when using lasers with pulse durations of 1 ps and 120 fs. XRD analysis revealed the presence of compressive residual stresses in the scribed region with the 6 ns and 500 ps lasers, and tensile residual stresses in the scribed region with the 1 ps and 120 fs lasers. Oxide layer formation was observed in all pulse regimes. A theoretical simulation was conducted to estimate the temperature on the dielectric substrate. Complete removal of Cu from the dielectric substrate would result in thermal damage. A hybrid micro-scribing technique, involving immersion in NaCl solution during the final laser scan, was demonstrated for nanosecond laser processing. Finally, a frequency selective surface (FSS) was fabricated using the hybrid scribing technique.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Sree Harsha Choutapalli, H. G. Prashantha Kumar, Emmanuel Paneerselvam, Nilesh J. Vasa, R. Jayaganthan
Summary: Fabrication of single-crystal silicon carbide thin films without impurities is crucial for microelectromechanical systems applications. Pulsed laser deposition combined with annealing can be used to grow 6H-SiC thin films at lower temperatures than conventional vapor deposition techniques. This study investigated the pulsed laser deposition of 6H-SiC thin films using two different silicon carbide targets and varying substrate temperatures. The results showed that smooth and continuous SiC film growth with low electrical resistance can be achieved using the reaction bonding technique.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Baskar Thangabalan, Neelmani, Neelesh J. Vasa, Ramanujam Sarathi, Noureddine Harid, Huw Griffiths
Summary: The present study investigates the effects of corona aging on the surface properties of silicone rubber alumina nanocomposites. The addition of alumina nanofiller improves the resistance to corona discharge, with an optimal filling amount. The samples exhibit a fast recovery in the first few hours after corona aging, and most of them regain their properties after about 8 hours of recovery time.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Optics
Manish Chandra, Satyanarayanan Seshadri, Nilesh J. Vasa
Summary: This paper presents a dual-wavelength absorption-based approach for measuring and validating the steam dryness fraction of wet steam. The accuracy of the dryness measurement system using this optical method is determined to be +/- 1% for the range of dryness and operating pressure (1-10 bars) of wet steam.
Article
Engineering, Electrical & Electronic
K. Saran Kumar, Y. Esther Blesso Vidhya, Ramya Selvaraj, Satyanarayanan Seshadri, S. M. Shiva Nagendra, Nilesh J. Vasa
Summary: This article presents a dual-wavelength band broadband photoacoustic spectroscopy (BPAS) technique ideally suited to low-energy broadband sources for industrial and environmental multigas sensing applications. The proposed technique allows for comprehensive concentration measurement and eliminates the impact of cross sensitivity among gases. The MDL achieved for methane, ammonia, and carbon monoxide were 0.4 and 0.7 ppm, 0.3 and 1.8 ppm, and 2.6 ppm, respectively.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Manufacturing
Y. Esther Blesso Vidhya, Nilesh J. Vasaa
Summary: Light-trapping is crucial for thin film solar cells, and the use of surface micro/nanostructures can improve light absorption. This study demonstrates the reduction of reflection and enhanced light trapping by fabricating random nanocones on a-Si thin film surfaces. Experimental results show a significant decrease in reflectance and good stability in thermal tests.
MANUFACTURING LETTERS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Sooraj Shiby, Yugandhara R. Yadam, Balamurugan T. Sivaprakasam, Kavitha Arunachalam, Nilesh J. Vasa
Summary: Micro-scale removal of Cu from a dielectric substrate using a hybrid technique of nanosecond laser-activated electrochemical micro-scribing has been demonstrated in this study. The technique successfully removed Cu from the dielectric material, improved surface morphology, and provided thermal protection.
LASER-BASED MICRO- AND NANOPROCESSING XVI
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Emmanuel Paneerselvam, Nilesh J. Vasa, Daisuke Nakamura, I. A. Palani, Mitsuhiro Higashihata, Ramachandra M. S. Rao, Tiju Thomas
Summary: The study demonstrated that silicon carbide (SiC) thin films can be grown on Si substrates at a high temperature using pulsed laser deposition (PLD), and laser annealing can induce crystalline characteristics in the deposited amorphous SiC films. X-ray diffraction and Raman analysis were utilized to identify the crystalline characteristics of the samples, while numerical analysis was conducted to investigate temperature distribution and the mechanism of laser-assisted annealing.
MATERIALS TODAY-PROCEEDINGS
(2021)