Carbon-Nanotube-Based FR-4 Patch Antenna as a Bio-Material Sensor

Mohammadi, Ahmad; Ismail, Alyani; Mahdi, Mohd Adzir; Abdullah, Rusli; isa, maziah md; Sadrolhosseini, Amir Reza

doi:10.1016/j.proeng.2012.07.235

Cited by 8 publications

(7 citation statements)

References 6 publications

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“…Non-responsiveness toward undesired particles (for instance, interfering liquid in a sample matrix) is called as selectivity [ 87 ] and lack of it in microwave chemical sensors including those inspired from metamaterial structures is a serious issue. To address this concern, hybrid sensing has been proposed [ 88 ]. Hybrid sensors are based on microwave detection and they achieve selectivity using some chemical coating/layer.…”

Section: Challenges and Strategiesmentioning

confidence: 99%

“…Hybrid sensors are based on microwave detection and they achieve selectivity using some chemical coating/layer. For instance, affinity of carbon nanotube toward ethanol is exploited in [ 88 ], where a thin layer of carbon nanotube is coated on a patch antenna to detect ethanol. In [ 89 ], a microwave gas sensor is built using hybrid technology.…”

Section: Challenges and Strategiesmentioning

confidence: 99%

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Review of Recent Metamaterial Microfluidic Sensors

Salim

Lim

2018

Sensors

182

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Metamaterial elements/arrays exhibit a sensitive response to fluids yet with a small footprint, therefore, they have been an attractive choice to realize various sensing devices when integrated with microfluidic technology. Micro-channels made from inexpensive biocompatible materials avoid any contamination from environment and require only microliter–nanoliter sample for sensing. Simple design, easy fabrication process, light weight prototype, and instant measurements are advantages as compared to conventional (optical, electrochemical and biological) sensing systems. Inkjet-printed flexible sensors find their utilization in rapidly growing wearable electronics and health-monitoring flexible devices. Adequate sensitivity and repeatability of these low profile microfluidic sensors make them a potential candidate for point-of-care testing which novice patients can use reliably. Aside from degraded sensitivity and lack of selectivity in all practical microwave chemical sensors, they require an instrument, such as vector network analyzer for measurements and not readily available as a self-sustained portable sensor. This review article presents state-of-the-art metamaterial inspired microfluidic bio/chemical sensors (passive devices ranging from gigahertz to terahertz range) with an emphasis on metamaterial sensing circuit and microfluidic detection. We also highlight challenges and strategies to cope these issues which set future directions.

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Section: Challenges and Strategiesmentioning

confidence: 99%

Section: Challenges and Strategiesmentioning

confidence: 99%

Review of Recent Metamaterial Microfluidic Sensors

Salim

Lim

2018

Sensors

182

View full text Add to dashboard Cite

show abstract

“…However, different CNT composite materials are produced by mixing the CNTs material with other materials. Then, designing and implementing many types of antennas at low-GHz frequency bands due to these CNT composite materials [37][38][39][40] is carried out. These antennas are, in fact, advantageous in many applications.…”

Section: Methodsmentioning

confidence: 99%

Review - coating methods of carbon nanotubes and their potential applications

Jurn

Malek

Liu

et al. 2014

2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE 2014)

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the electrical, mechanical and physical properties of carbon nanotubes have been applied in different fields. The fabrication new composite materials of carbon nanotubes by various methods illustrates how new avenues are used in many areas of science and technology. The coating method of carbon nanotubes is one of the fabrication techniques. This review therefore, aims to present a general lid on different kinds of coating methods employed to fabricate new composite materials of carbon nanotubes. Their potential applications are also addressed. The key conditions of preferable coating methods that commensurate with CNT antennas applications are then proposed in this paper.

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“…Our proposed biosensor is also compared with RF MEMS bio/chemical sensors as given in Table 3. These sensors showed frequency shifts in the range of 10-40 MHz [41][42][43][44]. Another MEMS-based RF biosensor is developed to detect glucose levels in human serum, and it showed a frequency shift of 160 MHz [13].…”

Section: Lod = 3 3 × Standard Deviation Slopementioning

confidence: 99%

Microfluidic Biosensor Based on Microwave Substrate-Integrated Waveguide Cavity Resonator

et al. 2018

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A microfluidic biosensor is proposed using a microwave substrate-integrated waveguide (SIW) cavity resonator. The main objectives of this noninvasive biosensor are to detect and analyze biomaterial using tiny liquid volumes (3 μL). The sensing mechanism of our proposed biosensor relies on the dielectric perturbation phenomenon of biomaterial under test, which causes a change in resonance frequency and return loss (amplitude). First, an SIW cavity is realized on a Rogers RT/Duroid 5870 substrate. Then, a microwell made from polydimethylsiloxane (PDMS) material is loaded on the SIW cavity to observe the perturbation phenomenon. The microwell is filled with phosphate-buffered saline (PBS) solution (reference biological medium). To demonstrate the sensing behavior, the fibroblast (FB) cells from the lungs of a human male subject are analyzed and one-port S-parameters are measured. The resonance frequency of the structure with FB cells is observed to be 13.48 GHz. The reproducibility and repeatability of our proposed biosensor are successfully demonstrated through full-wave simulations and measurements. The resonance frequency of the FB-loaded microwell showed a shift of 170 MHz and 20 MHz, when compared to those of empty and PBS-loaded microwells. Its analytical limit of detection is 213 cells/μL. Our proposed biosensor is noncontact and reliable. Furthermore, it is miniaturized, inexpensive, and fabricated using simple- and easy-design processes.

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Carbon-Nanotube-Based FR-4 Patch Antenna as a Bio-Material Sensor

Cited by 8 publications

References 6 publications

Review of Recent Metamaterial Microfluidic Sensors

Review of Recent Metamaterial Microfluidic Sensors

Review - coating methods of carbon nanotubes and their potential applications

Microfluidic Biosensor Based on Microwave Substrate-Integrated Waveguide Cavity Resonator

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