Continuous and Real-Time Measurement of Plant Water Potential Using an AAO-Based Capacitive Humidity Sensor for Irrigation Control

Han, Sang-Hoon; Kim, Woo-Joong; Lee, Hyun Jae; Joyce, Robin; Lee, Junghoon

doi:10.1021/acsaelm.2c01111

Cited by 5 publications

(5 citation statements)

References 49 publications

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“…Thus, the water content in the material has a noticeable effect on the capacitance value of the capacitor, which is illustrated by a series of studies [ 22 , 23 , 24 ]. For example, the moisture content of plants can be obtained via such sensing technology [ 25 , 26 , 27 ]. In addition, the calculation formula for the capacitance value of a cylindrical capacitor is shown below:

where;

is permittivity, L is the height of the cylinder, R is the exradius, and r is the inner radius.…”

Section: Resultsmentioning

confidence: 99%

In Situ Fabricated Liquid Metal Capacitors for Plant Sensing

et al. 2023

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Capacitive sensors are essential to promoting modernization and intelligence in agriculture. With the continuous advancement of this sensor technology, the demand for materials with high conductivity and flexibility is rapidly increasing. Herein, we introduce liquid metal as a solution for the in-site fabrication of high-performance capacitive sensors for plant sensing. As a comparison, three pathways have been proposed for the preparation of flexible capacitors inside plants, as well as on their surfaces. Specifically, concealed capacitors can be constructed by directly injecting liquid metal into the plant cavity. Printable capacitors are prepared via printing Cu-doped liquid metal with better adhesion on plant surfaces. A composite liquid metal-based capacitive sensor is achieved by printing liquid metal on the plant surface and injecting it into the interior of the plant. While each method has limitations, the composite liquid metal-based capacitive sensor provides an optimal trade-off between signal capture capability and operability. As a result, this composite capacitor is chosen as a sensor for monitoring water changes within plants and demonstrates the desired sensing performance, making it a promising technology for monitoring plant physiology.

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where;

is permittivity, L is the height of the cylinder, R is the exradius, and r is the inner radius.…”

Section: Resultsmentioning

confidence: 99%

In Situ Fabricated Liquid Metal Capacitors for Plant Sensing

et al. 2023

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“…Since the 1950s, thousands of AAO-related papers have been published in international journals, covering a wide range of applications. These include nanomaterial synthesis [7,[29][30][31][32], electrical humidity sensors [33][34][35][36][37][38][39][40][41][42][43][44][45][46], optical sensors [47][48][49][50][51][52][53], photonic and electronic devices [54][55][56][57][58][59][60][61][62][63][64], photocatalysis [65][66][67], bio-applications [68][69][70], and other fields [71][72][73], as highlighted in Figure 1. A noteworthy contribution to AAO-based nanomaterial synthesis is the work proposed by Masuda et al [74...…”

Section: Overview Of Nanoporous Aao and Its Applicationsmentioning

confidence: 99%

Advances in the Fabrication of Nanoporous Anodic Aluminum Oxide and Its Applications to Sensors: A Review

Ku,

Yu,

Hung

et al. 2023

Nanomaterials

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Nanoporous anodic aluminum oxide (AAO) is an important template for 1D nanomaterial synthesis. It is used as an etching template for nanopattern transfer in a variety of contexts, including nanostructured material synthesis, electrical sensors, optical sensors, photonic and electronic devices, photocatalysis, and hardness and anticorrosion improvement. In this review, we focus on various fabrication methods, pore geometry modification, and recent advances of AAO, as well as sensor applications linked to our environment, daily life, and safety. Pore geometry is concerned with the material composition, applied voltage mold, electrolyte type, temperature, and anodizing time during the fabrication of AAOs and for adjusting their pore size and profile. The applied voltage can be divided into four types: direct current anodization (DCA), reverse pulse anodization, pulse anodization (PA), and hybrid pulse anodization (HPA). Conventional AAOs are fabricated using DCA and mild anodization (MA) at a relatively low temperature (−5~15 °C) to reduce the Joule heating effect. Moreover, the issues of costly high-purity aluminum and a long processing time can be improved using HPA to diminish the Joule heating effect at relatively high temperatures of 20–30 °C with cheap low-purity (≤99%) aluminum. The AAO-based sensors discussed here are primarily divided into electrical sensors and optical sensors; the performance of both sensors is affected by the sensing material and pore geometry. The electrical sensor is usually used for humidity or gas measurement applications and has a thin metal film on the surface as an electrode. On the contrary, the AAO optical sensor is a well-known sensor for detecting various substances with four kinds of mechanisms: interference, photoluminescence, surface plasma resonance, and surface-enhanced Raman scattering (SERS). Especially for SERS mechanisms, AAO can be used either as a solid support for coating metal nanoparticles or a template for depositing the metal content through the nanopores to form the nanodots or nanowires for detecting substances. High-performance sensors will play a crucial role in our living environments and promote our quality of life in the future.

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“…Nanosensors Soil nutrient monitoring, plant disease detection, pest detection [191] Quantum dots Detection of plant viruses, monitoring of transgenic plants [192] Gold NPs Identification of GM crops, pathogen detection [193,194] Magnetic NPs Detection of heavy metals in soil, water monitoring [195] Nanobarcodes Tracking and identification of plant species, traceability of agri-food products [187] Carbon nanotubes Monitoring of plant growth, detection of pesticides [196] Nanofluidic devices Control of irrigation, soil water content measurement [197]…”

Section: Nanodiagnostic System Application In Agriculture Referencementioning

confidence: 99%

Emerging Frontiers in Nanotechnology for Precision Agriculture: Advancements, Hurdles and Prospects

Yadav

Ahmad

et al. 2023

Agrochemicals

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This review article provides an extensive overview of the emerging frontiers of nanotechnology in precision agriculture, highlighting recent advancements, hurdles, and prospects. The benefits of nanotechnology in this field include the development of advanced nanomaterials for enhanced seed germination and micronutrient supply, along with the alleviation of biotic and abiotic stress. Further, nanotechnology-based fertilizers and pesticides can be delivered in lower dosages, which reduces environmental impacts and human health hazards. Another significant advantage lies in introducing cutting-edge nanodiagnostic systems and nanobiosensors that monitor soil quality parameters, plant diseases, and stress, all of which are critical for precision agriculture. Additionally, this technology has demonstrated potential in reducing agro-waste, synthesizing high-value products, and using methods and devices for tagging, monitoring, and tracking agroproducts. Alongside these developments, cloud computing and smartphone-based biosensors have emerged as crucial data collection and analysis tools. Finally, this review delves into the economic, legal, social, and risk implications of nanotechnology in agriculture, which must be thoroughly examined for the technology’s widespread adoption.

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Continuous and Real-Time Measurement of Plant Water Potential Using an AAO-Based Capacitive Humidity Sensor for Irrigation Control

Cited by 5 publications

References 49 publications

In Situ Fabricated Liquid Metal Capacitors for Plant Sensing

In Situ Fabricated Liquid Metal Capacitors for Plant Sensing

Advances in the Fabrication of Nanoporous Anodic Aluminum Oxide and Its Applications to Sensors: A Review

Emerging Frontiers in Nanotechnology for Precision Agriculture: Advancements, Hurdles and Prospects

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