@article{mahadi2025carbon,

title = {CARBON NANOTUBE-CHITOSAN THIN FILM ON QCM (QUARTZ CRYSTAL MICROBALANCE) FOR DETECTION OF IPA (ISOPROPYL ALCOHOL)},

author = {Aisyah Shafiqah Mahadi and Mohd Asyraf Mohd Razib and Aliza Aini Md Ralib and Farah Ahmad and Marmeezee Mohd Yusof},

url = {https://journals.iium.edu.my/bnrej/index.php/bnrej/article/view/123},

doi = {https://doi.org/10.31436/cnrej.v9i2.123},

year  = {2025},

date = {2025-12-28},

urldate = {2025-01-01},

journal = {Chemical and Natural Resources Engineering Journal (Formally known as Biological and Natural Resources Engineering Journal)},

volume = {9},

number = {2},

pages = {1–13},

abstract = {This study presents the development of a quartz crystal microbalance (QCM) sensor coated with a multi-walled carbon nanotube–chitosan (MWCNT-COOH/CS) composite for the detection of isopropyl (IPA) vapor, a common volatile organic compound (VOC). The composite was synthesized via glutaraldehyde crosslinking to enhance bonding between carboxyl-functionalized MWCNTs and chitosan, followed by sonication and stirring to ensure uniform dispersion. Material characterization was carried out using Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and field-emission scanning electron microscopy (FESEM), confirming successful integration and interaction between MWCNTs and CS. Static QCM analysis showed that the MWCNT-COOH/CS composite achieved a balanced frequency shift of approximately 106 Hz with a response time of ~40 seconds, outperforming standalone CS and MWCNT layers in terms of response speed and signal stability. Dynamic measurements across IPA concentrations from 300 to 700 ppm revealed a linear frequency shift trend with a correlation coefficient (R²) of 0.9713. Compared with similar sensors reported in the literature, the developed composite exhibits promising sensitivity, faster response time, and ease of fabrication, suggesting strong potential for real-time VOC monitoring applications.},

keywords = {Chitosan, IPA, MWCNTs (Multi-Walled Carbon Nanotubes), Nanocomposite sensor, openQCM, Quartz Crystal Microbalance (QCM)},

pubstate = {published},

tppubtype = {article}

}

@article{article,

title = {Multiwalled carbon nanotube/chitosan composite on quartz crystal microbalance for formaldehyde detection},

author = {Aisyah Mahadi and Mohd Razib and Aliza-Aini Md-Ralib and Farah Ahmad and Marmeezee Yusof},

url = {https://www.researchgate.net/publication/394351958_Multiwalled_carbon_nanotubechitosan_composite_on_quartz_crystal_microbalance_for_formaldehyde_detection},

doi = {10.11591/eei.v14i4.8948},

year  = {2025},

date = {2025-08-01},

urldate = {2025-08-01},

journal = {Bulletin of Electrical Engineering and Informatics},

volume = {14},

pages = {2638-2648},

keywords = {Chitosan, Multi-walled carbon nanotubes/chitosan, MWCNTs (Multi-Walled Carbon Nanotubes), openQCM Software, QCM, Quartz Crystal Microbalance, Volatile organic compounds},

pubstate = {published},

tppubtype = {article}

}

@article{al2024development,

title = {Development of Poly (safranine-co-phenosafranine)/GNPs/MWCNTs Nanocomposites for Quartz Crystal Microbalance Sensor Detection of Arsenic (III) Ions},

author = {Salsabeel Al-Sodies and Abdullah M Asiri and Sameh Ismail and Khalid A Alamry and Mahmoud Hussein Abdo},

url = {https://iopscience.iop.org/article/10.1088/2053-1591/ad37a5/meta},

year  = {2024},

date = {2024-04-12},

urldate = {2024-04-12},

journal = {Materials Research Express},

abstract = {Contamination of drinking water by heavy metals is extremely dangerous to human health. The formation of a quartz crystal microbalance (QCM) sensor for the rapid and portable detection of harmful heavy metals such as arsenic (As) ions in water samples is detailed in this work. Equimolar ratios of safranine (SF) and phenosafranine (Ph) copolymers (PSF-Ph) were synthesized via a chemical oxidative polymerization approach. The copolymer was modified with multi-wall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) at different percentages (1, 3, 5, and 10%) to form nanocomposites of PSF-Ph/MWCNTs/GNPs. Thermal analysis of the nanocomposites revealed that the final polymer decomposition temperature (PDTfinal) values fell between 619 and 630 °C, and the nanocomposite with 10% loading exhibited the highest decomposition temperatures for T10, T30, and T50. The nanohybrid QCM sensor detected As(III) down to parts-per-billion levels based on the change in the oscillation frequency. The sensor was tested on water samples spiked with different concentrations of As(III) (0–20 ppb). A strong linear correlation (R2 ≈ 0.99) between the frequency shift and concentration with a low detection limit (0.1 ppb) validated the quantitative detection capability of the sensor. This QCM platform with an optimal recognition ligand is a promising field-deployable tool for on-site arsenic analysis in water.},

keywords = {contamination, Drinking water, GNPs (Graphene Nanoplatelets), MWCNTs (Multi-Walled Carbon Nanotubes), Nanocomposites, openQCM sensors, Poly(phenosafranine), Poly(safranine), QCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}