@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}

}

@article{haldar2024steering,

title = {Steering diffusion selectivity of chemical isomers within aligned nanochannels of metal-organic framework thin film},

author = {Ritesh Haldar and Tanmoy Maity and Susmita Sarkar and Susmita Kundu and Suvendu Panda and Arighna Sarkar and Kalyaneswar Mandal and Soumya Ghosh and Jagannath Mondal},

url = {https://www.researchsquare.com/article/rs-4046811/v1},

doi = {https://doi.org/10.21203/rs.3.rs-4046811/v1},

year  = {2024},

date = {2024-03-21},

urldate = {2024-03-21},

abstract = {The movement of molecules (i.e. diffusion) within angstrom-scale pores of porous materials such as metal-organic frameworks (MOFs) and zeolites is influenced by multiple complex factors that can be challenging to assess and manipulate. Nevertheless, understanding and controlling this diffusion phenomenon is crucial for advancing energy-economic membrane-based chemical separation technologies, as well as for heterogeneous catalysis and sensing applications. Through precise assessment of the factors influencing diffusion within a porous metal-organic framework (MOF) thin film, we have developed a chemical strategy to manipulate and reverse chemical isomer diffusion selectivity. In the process of cognizing the molecular diffusion within oriented, angstrom-scale channels of MOF thin film, we have unveiled a dynamic chemical interaction between the adsorbate (chemical isomers) and the MOF using a combination of kinetic mass uptake experiments and molecular simulation. Leveraging the dynamic chemical interactions, we have reversed the haloalkane (positional) isomer diffusion selectivity, forging a novel chemical pathway to elevate the overall efficacy of membrane-based chemical separation and selective catalytic reactions.},

keywords = {Metal organic frameworks, MOFs, molecular diffusion, nanoporous materials, openQCM sensors, QCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}

@article{saffari2023signal,

title = {Signal amplification of a quartz crystal microbalance immunosensor by gold nanoparticles-polyethyleneimine for hepatitis B biomarker detection},

author = {Zahra Saffari and Reza Ahangari Cohan and Mina Sepahi and Mahdi Sadeqi and Mehdi Khoobi and Mojtaba Hamidi Fard and Amir Ghavidel and Fahimeh Bagheri Amiri and Mohammad Reza Aghasadeghi and Dariush Norouzian},

url = {https://www.nature.com/articles/s41598-023-48766-2},

doi = {https://doi.org/10.1038/s41598-023-48766-2},

year  = {2023},

date = {2023-12-09},

urldate = {2023-12-09},

journal = {Scientific Reports},

volume = {13},

number = {1},

pages = {21851},

publisher = {Nature Publishing Group UK London},

abstract = {The procedures currently used for hepatitis B (HB) detection are not suitable for screening, clinical diagnosis, and point-of-care testing (POCT). Therefore, we developed and tested a QCM-based immunosensor by surface modification with AuNP-PEIs to amplify the signal and provide an oriented-immobilization surface. The AuNP-PEIs were characterized by ICP-Mass, UV/Vis, DLS, FE-SEM, and ATR-FTIR. After coating AuNP-PEIs on the gold electrode surface, anti-HBsAg antibodies were immobilized using NHS/EDC chemistry based on response surface methodology (RSM) optimization. The efficiency of the immunosensor was assessed by human sera and data were compared to gold-standard ELISA using receiver-operating-characteristic (ROC) analysis. FE-SEM, AFM, EDS, and EDS mapping confirmed AuNP-PEIs are homogeneously distributed on the surface with a high density and purity. After antibody immobilization, the immunosensor exhibited good recognition of HBsAg with a calibration curve of ∆F =  − 6.910e-7x + 10(R2 = 0.9905), a LOD of 1.49 ng/mL, and a LOQ of 4.52 ng/mL. The immunosensor yielded reliable and accurate results with a specificity of 100% (95% CI 47.8–100.0) and sensitivity of 100% (95% CI 96.2–100.0). In conclusion, the fabricated immunosensor has the potential as an analytic tool with high sensitivity and specificity. However, further investigations are needed to convert it to a tiny lab-on-chip for HB diagnosis in clinical samples.},

keywords = {biomarker, hepatitis B, immunosensor, nanoparticles-polyethyleneimine, openQCM, openQCM sensors, QCM},

pubstate = {published},

tppubtype = {article}

}

@article{armutcu2023selective,

title = {Selective Aptasensor for Trinitrotoluene Detection: Comparison of the Detecting Performances from Liquid and Vapor Phases},

author = {Canan Armutcu and Tunca Karasu and Sena Pişkin and Erdoğan Özgür and Lokman Uzun},

url = {https://www.sciencedirect.com/science/article/abs/pii/S0927775723013420},

doi = {https://doi.org/10.1016/j.colsurfa.2023.132258},

year  = {2023},

date = {2023-11-05},

urldate = {2023-11-05},

journal = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},

pages = {132258},

publisher = {Elsevier},

abstract = {In general, chromatographic and sensor analyses have been utilized for explosive detection. The main interest on those systems is to develop a method to selectively detect explosives at a single step as well as from vapor phase if possible. Moreover, on-site and real-time detection with portable systems is another challenge for the researchers. On the other hand, the detection of 2,4,6-trinitrotoluene (TNT) vapor at the crime scene, preferably before the explosion is highly demanded in order to prevent the negative effects of terrorism and to ensure the safety of the civilian population. In this study, initially, Quartz Crystal Microbalance (QCM) sensor was prepared for real-time monitoring of TNT in aqueous solution, through the attachment of TNT peptide aptamer on the gold surface of QCM sensor. Secondly, after providing optimum conditions, TNT detection was investigated even from vapor phase through the QCM aptasensor. According to results, the selectivity coefficient of QCM-based aptasensor was calculated as 6.78 for TNT in respect to DNT whereas that was calculated as 9.02 for TNT in respect to TNB. In addition, the evaluation of the reusability and storage stability emphasized that the sensor could be used repeatedly without significant reduction in dissipation (∆D) values. The linearity coefficient (R2) was found to be 0.9965. The limit of detection (LOD) and the limit of quantitation (LOQ) were determined as 0.0238 and 0.0739 nM, respectively. The studies demonstrated that the portable QCM sensor decorated with the aptamer selective for TNT molecules could be classified as a promising alternative, selective, cost-friendly, easy-to-prepare, ready-to-use, and applicable for on-site and real-time explosive measurements (even from vapor phase).},

key = {openQCM Q-1, QCM-D, openQCM sensors,  explosive detection, TNT,  aptasensor},

keywords = {aptasensor, explosive detection, openQCM Q-1, openQCM sensors, QCM-D, TNT},

pubstate = {published},

tppubtype = {article}

}

@article{aflaha2023maltodextrin,

title = {Maltodextrin-overlaid polyvinyl acetate nanofibers for highly sensitive and selective room-temperature ammonia sensors},

author = {Rizky Aflaha and Nur Laili Indah Sari and Laila Katriani and Ahmad Hasan As' ari and Ahmad Kusumaatmaja and Aditya Rianjanu and Roto Roto and Hutomo Suryo Wasisto and Kuwat Triyana},

url = {https://www.sciencedirect.com/science/article/abs/pii/S0026265X23008561},

doi = {https://doi.org/10.1016/j.microc.2023.109237},

year  = {2023},

date = {2023-10-01},

urldate = {2023-10-01},

journal = {Microchemical Journal},

pages = {109237},

publisher = {Elsevier},

abstract = {Various ammonia sensors based on different materials have continuously been developed and employed to enable real-time monitoring of ammonia gas in the environment. Efforts are put not only to improve their sensitivity and selectivity towards the target gas but also to operate them at room temperature. Here, we investigated the effect of overlaying maltodextrin with different concentrations on the surface of polyvinyl acetate (PVAc) nanofibers on ammonia sensing performances, in which quartz crystal microbalance (QCM) was utilized as a transducer to measure the resonance frequency shift affected by the adsorbed gas molecules. Higher concentrations of the overlaying maltodextrin led to larger nanofiber diameter and more functional active groups on the active nanofibrous layers. PVAc nanofibers with 0.05% maltodextrin overlay demonstrated the highest sensitivity of 0.525 Hz·ppm−1 at room temperature, which was 6.4 times higher than their bare counterpart (nanofiber without maltodextrin overlay). That sensor also possessed fast response and recovery times of 32 s and 17 s with a low detection limit (1.92 ppm). Besides its high reproducibility, reversibility, and repeatability, the sensor exhibited outstanding selectivity to other gas analytes and good long-term stability for 32 days of testing. This research shows that maltodextrin overlay can be used as a low-cost alternative route to increase the performance of organic material-based ammonia sensors, especially polymer nanofibers.},

key = {QCM, 10 MHz, QCM sensors, polyvinyl acetate, nanofibers, ammonia},

keywords = {10 MHz, Ammonia, Nanofibers, openQCM sensors, Polyvinyl acetate, QCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}

@article{JANG2023134589,

title = {Heated quartz crystal microbalance with highly controlled integration of ZIF-67 for ultra-reliable humidity sensing},

author = {Il Ryu Jang and Sugato Hajra and Rojalin Sahu and Hoe Joon Kim},

url = {https://www.sciencedirect.com/science/article/pii/S0925400523013047},

doi = {https://doi.org/10.1016/j.snb.2023.134589},

issn = {0925-4005},

year  = {2023},

date = {2023-09-09},

urldate = {2023-01-01},

journal = {Sensors and Actuators B: Chemical},

pages = {134589},

abstract = {The quartz crystal microbalance (QCM) is widely utilized in various fields for detecting parameters such as relative humidity (RH). However, the reliability of QCM as an RH sensor can be compromised by the nonuniform integration of sensing materials and the absence of a dehumidification system for calibration. Damping of the sensor performance may occur due to excessive water molecule adsorption on agglomerated sensing materials, while ineffective desorption of water molecules from these materials renders QCM-based humidity sensors unreliable in highly humid environments. This study presents an innovative approach to achieve area-specific and highly-controlled integration of ZIF-67 on a quartz crystal microbalance (QCM) using electrospray deposition (ESD). The proposed method effectively decorates the sensor surface with exceptional picogram (pg) mass resolution. Additionally, an integrated microheater facilitates rapid sensor heating, eliminating residual water molecules and enhancing the proposed self-recalibration method. The comparative analysis demonstrates that the heated sensor exhibits a remarkable improvement of 47 times in hysteresis and 8 times in drift performance compared to the non-heated sensor. These findings hold great promise for enhancing the reliability of QCM-based humidity sensors, thereby finding utility in diverse research and application fields.},

keywords = {10 MHz, metal-organic framework, microheater, openQCM sensors, Quartz Crystal Microbalance, sensor calibration, ZIF-67},

pubstate = {published},

tppubtype = {article}

}

@article{aflaha2023enhanced,

title = {Enhanced trimethylamine gas sensor sensitivity based on quartz crystal microbalance using nanofibers overlaid with maltodextrin},

author = {Rizky Aflaha and Laila Katriani and Ahmad Hasan As’ ari and Nur Laili Indah Sari and Ahmad Kusumaatmaja and Aditya Rianjanu and Roto Roto and Kuwat Triyana},

url = {https://link.springer.com/article/10.1557/s43579-023-00409-3},

doi = {https://doi.org/10.1557/s43579-023-00409-3},

year  = {2023},

date = {2023-08-03},

urldate = {2023-08-03},

journal = {MRS Communications},

pages = {1--9},

publisher = {Springer},

abstract = {This study proposes a novel quartz crystal microbalance-based sensor using polyvinyl acetate nanofibers overlaid with maltodextrin to enhance sensitivity toward trimethylamine (TMA) gas. The sensor demonstrated a remarkable increase in sensitivity by 8.3 times, with a detection limit of 15.6 ppm. The enhanced sensitivity is due to reversible intermolecular Lewis acid–base interaction between active groups of maltodextrin and TMA gas molecules. Moreover, the sensor exhibited good selectivity, stability, and fast response and recovery times of 141 s and 116 s, respectively. The proposed sensor offers a promising alternative to conventional methods for accurately monitoring TMA gas levels in the air.},

key = {openqCM, QCM , quartz Crystal Microbalance openQCM sensors},

keywords = {openQCM, openQCM sensors, QCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}