Article
Chemistry, Applied
Irfan Ullah, Khasan Sanginovich Karimov, Mohd Adib Ibrahim, Noshin Fatima
Summary: The paper presents a proposal for a flexible, shockproof, vibration-free compressive displacement sensor based on a composite material, with impedance characteristics that have inverse and direct relationships with different types of compressive displacement. The sensors are identified as cost-effective and versatile devices for use in medical applications and educational settings.
COLORATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Umair Asghar, Khasan S. Karimov, Mohd Adib Ibrahim, Noshin Fatima
Summary: This study investigates an organic multifunctional sensor based on a composite of nickel phthalocyanine colourant, multi-walled carbon nanotubes, and rubber, exploring its electric parameters under varying humidity, frequency, and temperature. The results demonstrate a decrease in impedance and resistance with increased temperature and humidity, while sensitivity decreases with higher frequency. Such sensors could be utilized in the medical industry for monitoring patient humidity and temperature during physiotherapy treatments.
COLORATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Sumbel Ijaz, Ehsan Raza, Zubair Ahmad, Muhammad Zubair, Muhammad Qasim Mehmood, Haris Mehmood, Yehia Massoud, M. Muqeet Rehman
Summary: Perovskite solar cells based on carbon electrodes (c-PSCs) without a hole transport material (HTM) have attracted attention due to their cost-effectiveness and simplified structure. However, their application is limited by low efficiency and the use of electron transport materials (ETMs) like TiO2, which undergo extreme temperatures during manufacturing and have poor optoelectronic properties. In this study, an HTM-free device based on FTO/TiO2/CH3NH3PbI3/carbon structure is investigated using a one-dimensional Solar Cell Capacitance Simulator (SCAPS-1D). The design is optimized by substituting TiO2 with different inorganic ETMs, resulting in the best performance with ZnSe as the ETM.
Article
Engineering, Electrical & Electronic
Rahmat Zaki Auliya, Arn Er Soh, Wee Chen Gan, Yew Hoong Wong, Muhammad Aniq Shazni Mohammad Haniff, M. F. Mohd Razip Wee, Rad Sadri, Navid Aslfattahi, Noshin Fatima, Masuri Othman, Chang Fu Dee, Poh Choon Ooi
Summary: Short-circuit electrodes, poor surface contact, and low beta-phase fraction are common issues researchers face when preparing piezoelectric nanogenerators. To address these issues and improve device operation, we conducted experiments using different concentrations of PVDF mixed with a fixed amount of Ti3C2Tx in a bistacked structure. The incorporation of MXene at higher concentrations of PVDF improved the open-circuit voltage (Voc) and short-circuit current (Isc) due to factors such as appropriate nanocomposite thickness, surface roughness, uniform dispersion of nanofillers, and high beta-phase fraction. The nanocomposite with 17.5 wt% PVDF displayed a Voc of approximately 6.4 V, an Isc of approximately 1.5 mu A, and an 87% beta-phase content, potentially attributed to stretched chain alignment of PVDF. This work highlights the feasibility of a solution-processed approach to fabricate nanogenerators for self-powered electronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Muhammad Tariq Saeed Chani, Khasan S. Karimov, Tahseen Kamal, Noshin Fatima, Mohammed M. Rahman, Abdullah M. Asiri
Summary: Polymeric rubber and organic semiconductor H2Pc-CNT composite-based shockproof deformable infrared radiation (IR) sensors were fabricated using a rubbing-in technique. The sensors showed decreased resistance and impedance when exposed to IR irradiation, and the temperature coefficients of resistance (TCR) were 1.2 and 1.1 for the surface-type and sandwich-type sensors, respectively. The high TCR value and novel composition of the H2Pc-CNT composite make these devices attractive for bolometric applications, and their easy fabrication and low-cost materials make them commercially viable.
Article
Education & Educational Research
Malavika Santhosh, Hafsa Farooqi, Mohammad Ammar, Nitha Siby, Jolly Bhadra, Noora J. Al-Thani, Abdellatif Sellami, Noshin Fatima, Zubair Ahmad
Summary: In recent decades, informal project-based learning (PjBL) for science, technology, engineering, and mathematics (STEM) education has become increasingly important. This meta-analytical study examines the effectiveness of informal PjBL models in school students' STEM education compared to traditional classroom settings. The results show that informal PjBL has moderately significant effects on students' learning gains and that influential variables such as teaching method, assessment method, course duration, and group size impact its effectiveness. This study contributes to the literature on effective STEM-based informal PjBL models.
JOURNAL OF SCIENCE EDUCATION AND TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Jahan Zeb Gul, Maryam Khan, Muhammad Muqeet Rehman, Zia Mohy Ud Din, Woo Young Kim
Summary: This paper introduces a linear resistive temperature sensor fabricated using PET thermoforming and 3D printing. The sensor offers cost-effectiveness, high precision, fast response, and short recovery time, making it suitable for temperature measurement in aquatic and aerial settings.
Article
Chemistry, Analytical
Noshin Fatima, Khasan S. Karimov, Farah Adilah Jamaludin, Zubair Ahmad
Summary: This study investigates the physics of a non-invasive multi-functional elastic thin-film graphite flake-isoprene sulfone composite sensor. The strain design and electrical characterization of stretching force, acceleration, and temperature were conducted. The sensors were fabricated using the rub-in technique and analyzed for their morphology using various methods to examine their surface and structure. The results showed that the sensors exhibited changes in impedance and resistance corresponding to different levels of stretching force, acceleration, and temperature. The devices are environmentally friendly, easy to build, and have potential applications in university research and healthcare.
Article
Green & Sustainable Science & Technology
Li Bin, Muhammad Shahzad, Hira Khan, Muhammad Mehran Bashir, Arif Ullah, Muhammad Siddique
Summary: Sustainable agriculture plays a critical role in a nation's economic growth, especially in the face of the challenge of feeding a growing global population. This paper introduces an innovative irrigation time control system that leverages fuzzy logic to regulate irrigation timing and addresses the issue of whitefly infestations. The system effectively reduces water wastage, enhances agricultural efficiency, and eliminates the need for human intervention.
Article
Materials Science, Multidisciplinary
Maryam Khan, Muhammad Muqeet Rehman, Shenawar Ali Khan, Muhammad Saqib, Woo Young Kim
Summary: Biomaterials will have significant effects on solving environmental problems caused by toxic materials. This study presents the design, fabrication, and performance evaluation of a fully biocompatible humidity sensor with gelatin as the active layer, contributing to the reduction of electronic waste.
FRONTIERS IN MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Hafiz Mohammad Mutee Ur Rehman, Muhammad Muqeet Rehman, Maryam Khan, Sang-Jae Kim, Woo Young Kim, Asokan Poorani Sathya Prasanna
Summary: Using naturally available green materials is necessary to reduce the burden of electronic wastes on the environment. In this study, we explored the multifunctional humidity sensitive response of a cellulose enriched edible rice paper (CERP). CERP showed fast response/recovery times, high sensitivity, and was also used as a self-powered humidity sensor and energy harvester.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Chemistry, Analytical
Sheik Abdur Rahman, Shenawar Ali Khan, Shahzad Iqbal, Muhammad Muqeet Rehman, Woo Young Kim
Summary: In this study, a high-performance humidity sensor was developed using purple sweet potato peel as the substrate and sensing layer. The sensor exhibited a wide detection range, high sensitivity, minimal hysteresis, rapid response and recovery times, and potential applications in respiratory monitoring and noncontact proximity response.
Article
Engineering, Electrical & Electronic
Shenawar Ali Khan, Muhammad Saqib, Maryam Khan, Muhammad Muqeet Rehman, Sheik Abdur Rahman, Woo Young Kim
Summary: In this study, a humidity sensor was developed using a nanocomposite of indium(III) selenide (In2Se3) nanoflakes and PEDOT:PSS polymer, which exhibited high responsivity to a wide range of humidity levels. The synthesized 2D In2Se3 nanoflakes were dispersed using PEDOT:PSS by a sol-gel process, resulting in the fabrication of a single humidity sensing device with exceptional sensitivity. The sensor showed robust and repeatable response over a wide operating range of 5-95%RH and was applied in noncontact skin humidity detection, real-time environmental monitoring, and breathing tests.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Polymer Science
Khasan S. Karimov, Muhammad Tariq Saeed Chani, Noshin Fatima, Abdullah M. Asiri, Mohammed M. Rahman
Summary: Optimized surface-type impedimetric and capacitive proximity sensors have been fabricated on paper substrates using rubbing-in technology. These sensors can detect objects by sensing changes in impedance and/or capacitance when the object approaches, and they can be widely used in various fields due to their low cost, easy fabrication, and environmentally friendly materials.
Article
Energy & Fuels
Jalal Assadeg, Kamaruzzaman Sopian, Adnan Ibrahim, Ahmad Fudholi, Noshin Fatima, Ali H. A. Al-Waeli, Ag Sufiyan Abd Hamid
Summary: This research paper presents a mathematical model of a solar air collector with a finned absorber and nano-enhanced PCM. The model simulates the thermal and thermo-hydraulic performance of the collector considering various operating parameters. The optimal energy and exergy efficiencies were achieved at a solar irradiance of 1000 W/m2 and a mass flow rate of 0.06 kg/s. The collector showed significant improvement potentials in terms of power output at different irradiance levels.
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY RESEARCH
(2023)
