Microwave dielectric relaxation study of 1-Hexanol with 1-propenol mixture by using time domain reflectometry at 300K

Tidar, A.L.; Sayyad, S.B.; Kamble, S. P.; Dharne, G.M.; Patil, S. S.; Khirade, P. W.; Mehrotra, S. C.

doi:10.1109/aemc.2009.5430597

Cited by 10 publications

(6 citation statements)

References 16 publications

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“…When fluid is introduced, it is noticed that the capacitance decreases over frequency. This is due to the high dispersion present in the fluids used in this study, which exhibit a large decrease in permittivity near 1 GHz [10], [11]. The capacitance when the fluid cavity is empty is approximately 0.05 pF and is stable until the self-resonant frequency (SRF) is reached near 7 GHz.…”

Section: Microfluidic Varactormentioning

confidence: 96%

“…These processes, however, are time-consuming, costly, and require the use of harsh chemicals. Because of these issues, extensive research has gone into [10], [11] alternate fabrication methods that allow for simple, low-cost, and rapid production of microfluidic devices. Several methods, such as laser-etched fluidics, craft cut fluidics, and wax-impregnated capillary action fluidics on paper, have emerged that can be produced outside of a cleanroom environment in a simple manner [1]- [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Inkjet-Printed Microfluidic RFID-Enabled Platform for Wireless Lab-on-Chip Applications

Cook

Cooper

Tentzeris

2013

IEEE Trans. Microwave Theory Techn.

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This paper introduces the first-of-its-kind wireless passive sensing platform combining radio frequency identification (RFID), microfluidics, and inkjet printing technology that enables remote fluid analysis and requires as little as 3 L of fluid. The demonstrated variable microfluidic capacitors, resonators, and RFID tags are fabricated using a novel rapid, low-cost, and low-temperature additive inkjet process, making them disposable. However, even with their disposable nature, the RF microfluidic devices exhibit repeatability and long-term reusability for accurately detecting water, various alcohols, and % content of water/alcohol mixtures down to 1% water in ethanol. While the main discussion is on fluid sensing, the demonstrated components can also be used in fluid-tunable RF applications.

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Section: Microfluidic Varactormentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

An Inkjet-Printed Microfluidic RFID-Enabled Platform for Wireless Lab-on-Chip Applications

Cook

Cooper

Tentzeris

2013

IEEE Trans. Microwave Theory Techn.

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“…[23], [28] III. THEORY In the natural environment, commonly utilized liquids have a wide permittivity distribution at microwave frequencies [21]- [23], as shown in Table I, while featuring different permittivity values at different temperatures or frequencies [24]- [26]. Moreover, for varying mixing ratios, mixtures of two or more fluids can feature a wide range of continuous permittivity change [25], [27].…”

Section: Sealing the Channelmentioning

confidence: 99%

Additively Manufactured Microfluidics-Based “Peel-and-Replace” RF Sensors for Wearable Applications

Cook

Tentzeris

2016

IEEE Trans. Microwave Theory Techn.

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This paper demonstrates the first-of-its-kind additively manufactured microfluidics-based flexible RF sensor, combining microfluidics, inkjet-printing technology, and soft lithography, which could potentially enable the first "real-world" wearable "smart skin" applications. A low-cost, rapid, lowtemperature, and zero-waste fabrication process is introduced, which can be used to realize complex microfluidic channel networks with virtually any type of sensing element embedded. For proof-of-concept purposes, a reusable and flexible microfluidics sensor was prototyped using this process, which only requires 0.6-μL fluid volume to produce a 44% frequency shift between an empty ( r = 1) and a water-filled channel ( r = 73), demonstrating a sensitivity that is higher than most previously reported microfluidics-based microwave sensors. Seven different fluids were used to measure the sensitivity of the prototype and an overall sensitivity of 24%/ log( r ) was observed. The "peel-and-replace" capability of the presented sensor not only facilitates the cleaning process for sensor reusability, but it also enables sensitivity tunability. For bent/conformed configurations, the sensor's functionality is good even for a bending radius down to 7 mm, demonstrating its great flexibility. After bending multiple times, the sensor still exhibits a very good performance repeatability, which verifies its reusability feature. The introduced additively manufactured RF microfluidics-based sensor would be well suited for numerous wearable and conformal fluid sensing applications (e.g., bodily fluids analyzing and food monitoring), while it could also be utilized in a variety of microfluidicsreconfigurable microwave components.

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“…As the first attempt, permittivity and conductivity behavior of binary aqueous mixtures of sodium chloride [ 124 ], ethanol [ 125 ], DMSO [ 126 ], DESO [ 127 ], glycine [ 128 ], ethylene glycol oligomer [ 129 ], 2-butoxyethanol [ 130 ], butyric acid [ 131 ], and 2-methoxyethanol [ 132 ] were reviewed. Later, other chemical compounds or their non-aqueous mixtures were also considered; among which methanol, 1-propanol, 2-propanol [ 133 ], dialkyl carbonates [ 134 ], 1-Hexanol/1-propenol [ 135 ], lithium salts/dimethyl carbonate [ 136 ], ethylene glycol - dimethyl sulfoxide [ 137 ], morpholine/n-butanol, and C16-ether-PN6-1ecith/methanol [ 131 ] can be named. Last efforts constituted reviewing a Ketone-like chemical, Dimethylketone (DMK), in mixture with 2–Butoxyethanol (2-BE) [ 138 ] and corn syrup [ 139 ].…”

Section: A Bimodal System: Dbt Plus Nrimentioning

confidence: 99%

Preliminary Results of a New Auxiliary Mechatronic Near-Field Radar System to 3D Mammography for Early Detection of Breast Cancer

Ghanbarzadeh-Dagheyan

Molaei

Obermeier

et al. 2018

Sensors

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Accurate and early detection of breast cancer is of high importance, as it is directly associated with the patients' overall well-being during treatment and their chances of survival. Uncertainties in current breast imaging methods can potentially cause two main problems: (1) missing newly formed or small tumors; and (2) false alarms, which could be a source of stress for patients. A recent study at the Massachusetts General Hospital (MGH) indicates that using Digital Breast Tomosynthesis (DBT) can reduce the number of false alarms, when compared to conventional mammography. Despite the image quality enhancement DBT provides, the accurate detection of cancerous masses is still limited by low radiological contrast (about 1%) between the fibro-glandular tissue and affected tissue at X-ray frequencies. In a lower frequency region, at microwave frequencies, the contrast is comparatively higher (about 10%) between the aforementioned tissues; yet, microwave imaging suffers from low spatial resolution. This work reviews conventional X-ray breast imaging and describes the preliminary results of a novel near-field radar imaging mechatronic system (NRIMS) that can be fused with the DBT, in a co-registered fashion, to combine the advantages of both modalities. The NRIMS consists of two antipodal Vivaldi antennas, an XY positioner, and an ethanol container, all of which are particularly designed based on the DBT physical specifications. In this paper, the independent performance of the NRIMS is assessed by (1) imaging a bearing ball immersed in sunflower oil and (2) computing the heat Specific Absorption Rate (SAR) due to the electromagnetic power transmitted into the breast. The preliminary results demonstrate that the system is capable of generating images of the ball. Furthermore, the SAR results show that the system complies with the standards set for human trials. As a result, a configuration based on this design might be suitable for use in realistic clinical applications.

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Microwave dielectric relaxation study of 1-Hexanol with 1-propenol mixture by using time domain reflectometry at 300K

Cited by 10 publications

References 16 publications

An Inkjet-Printed Microfluidic RFID-Enabled Platform for Wireless Lab-on-Chip Applications

An Inkjet-Printed Microfluidic RFID-Enabled Platform for Wireless Lab-on-Chip Applications

Additively Manufactured Microfluidics-Based “Peel-and-Replace” RF Sensors for Wearable Applications

Preliminary Results of a New Auxiliary Mechatronic Near-Field Radar System to 3D Mammography for Early Detection of Breast Cancer

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