A flexible humidity sensor constructed by ordered-pore-array of slightly reduced graphene oxide with much enhanced sensing response

Article Nanoscience & Nanotechnology

A Printed Flexible Humidity Sensor with High Sensitivity and Fast Response Using a Cellulose Nanofiber/Carbon Black Composite

Shogo Tachibana et al.

Summary: This article introduces a high-performance printed flexible humidity sensor using a cellulose nanofiber/carbon black composite. The sensor demonstrates high sensitivity, fast response, and flexibility.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Physical

Direct confirmation of confinement effects by NiO confined in helical SnO2 nanocoils and its application in sensors

Qingmin Hu et al.

Summary: The study presents a novel structure composed of NiO nanoparticles confined in SnO2 nanocoils, which shows higher sensing performance towards hydrogen. The sensor displays a quick response to 7-50 ppm of H-2 with short response and recovery times, along with high repeatability.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Nanoscience & Nanotechnology

Flexible relative humidity sensor based on reduced graphene oxide and interdigital electrode for smart home

Weile Jiang et al.

Summary: A flexible relative humidity sensor based on reduced graphene oxide (RGO) and interdigital electrode was designed and prepared in this study. The sensor exhibits high sensitivity and flexibility, making it suitable for applications in the field of smart homes.

MICRO & NANO LETTERS (2022)

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Article Chemistry, Analytical

A flexible humidity sensor based on self-supported polymer film

Xin Guan et al.

Summary: Self-supported polymer films were fabricated using the thiol-ene click cross-linking reaction and utilized as both the substrate and humidity-sensing material for humidity sensors. By optimizing the hydrophilic monomer content, the sensitivity and response speed of the sensors were improved. The prepared flexible sensors exhibited good stability under bending and long-term tests.

SENSORS AND ACTUATORS B-CHEMICAL (2022)

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Article Chemistry, Multidisciplinary

High-Quality Monolayer Reduced Graphene Oxide Films via Combined Chemical Reduction and Ethanol-Assisted Defect Restoration

K. Kanishka H. De Silva et al.

Summary: This article introduces a facile two-step reduction method to fabricate reduced graphene oxide (RGO) films with remarkable structural qualities. The method involves chemical reduction followed by thermal reduction to repair lattice vacancies, resulting in RGO films with high structural quality and electrical properties approaching pristine graphene.

ADVANCED MATERIALS INTERFACES (2022)

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Article Chemistry, Multidisciplinary

A Comparative Investigation of Chemically Reduced Graphene Oxide Thin Films Deposited via Spray Pyrolysis

Ilhem Bargaoui et al.

Summary: A comparative investigation was conducted on thin films of graphene oxide (GO) and chemically reduced graphene oxide (rGO) deposited onto glass substrates via spray pyrolysis. Two reduction techniques were studied: (1) exposure of a sprayed layer of GO to hydrazine hydrate vapors to produce rGOV, and (2) addition of liquid hydrazine hydrate to a suspended GO solution followed by spray deposition to produce rGOL. Three different spectroscopy techniques showed that the two reduced samples had less lattice disorder compared to GO, with rGOL having the highest degree of reduction. Atomic force microscopy revealed a morphological change in the films during exposure to hydrazine hydrate vapors, resulting in a 16-fold increase in thickness for the rGOV film compared to rGOL and GO. I-V measurements confirmed a significant decrease in resistivity after reduction, with rGOL exhibiting a resistivity 90 times lower than rGOV, indicating the highest degree of reduction. These findings suggest that the reduction process for rGOV is prone to introducing intercalated water molecules, while the fabrication technique for rGOL is a suitable method to obtain a material with minimal lattice disorder and properties approaching those of graphene.

ACS OMEGA (2022)

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Article Chemistry, Physical

Thin film nanoarchitectonics of layer-by-layer assembly with reduced graphene oxide on intraocular lens for photothermal therapy of posterior capsular opacification

Chengshou Zhang et al.

Summary: Near-infrared light-triggered photothermal therapy is considered an attractive noninvasive treatment for posterior capsular opacification (PCO) in cataract patients. Researchers have fabricated a new type of intraocular lens (IOL) with excellent biocompatibility, stability, and photothermal conversion property. The effectiveness of the IOL in preventing PCO has been demonstrated in in vitro and in vivo experiments.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Engineering, Electrical & Electronic

Flexible humidity sensor based on light-scribed graphene oxide

Emtinan Ouda et al.

Summary: The light scribe technique was used to reduce graphene oxide over a flexible substrate, resulting in a humidity sensor. The sensor showed rapid response and high precision, and can be directly fabricated on flexible substrates, making it highly favorable for future wearable smart electronics.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2022)

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Article Chemistry, Analytical

Flexible highly-sensitive humidity sensor based on CGO/SMPLAF for wearable human skin humidity detection

Shuo Li et al.

Summary: A flexible, high-sensitivity, and breathable humidity sensor for skin humidity monitoring was successfully fabricated in this study. The sensor, consisting of shape memory polylactic acid fiber and crumpled graphene oxide membrane, exhibited excellent humidity sensitivity, fast response time, and good flexibility.

SENSORS AND ACTUATORS B-CHEMICAL (2022)

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Review Electrochemistry

Self-Supported Graphene Nanosheet-Based Composites as Binder-Free Electrodes for Advanced Electrochemical Energy Conversion and Storage

Bowen Ren et al.

Summary: This review presents the preparation strategies and properties of self-supported graphene nanosheet-based composites (GNBCs). It also highlights recent developments in integrated binder-free electrodes for practical applications such as lithium-ion batteries and supercapacitors. The challenges and future perspectives in this emerging field are also discussed.

ELECTROCHEMICAL ENERGY REVIEWS (2022)

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Review Nanoscience & Nanotechnology

Multifunctional Flexible Humidity Sensor Systems Towards Noncontact Wearable Electronics

Yuyao Lu et al.

Summary: This article provides an overview of recent advances and applications of flexible humidity sensors, discussing different working mechanisms and strategies to enhance their performance. The importance of humidity sensors in human healthcare management and human-machine interactions, especially during the COVID-19 epidemic, is explored.

NANO-MICRO LETTERS (2022)

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Article Chemistry, Physical

Carbon nanodot-based humidity sensor for self-powered respiratory monitoring

Jinxu Qin et al.

Summary: This study develops humidity sensors based on carbon nanodots (CDs), which demonstrate high sensitivity and stability. By introducing a breath-driven triboelectric nanogenerator (TENG), a self-powered humidity sensor is created, showing potential for respiratory monitoring.

NANO ENERGY (2022)

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Article Chemistry, Multidisciplinary

A flexible tissue-carbon nanocoil-carbon nanotube-based humidity sensor with high performance and durability

Chengwei Li et al.

Summary: This article introduces a flexible humidity sensor based on a tissue-carbon nanocoil-carbon nanotube composite. The sensor exhibits a wide sensing range, high sensitivity, long-term stability, high resolution accuracy, and fast response time. It also demonstrates excellent performance in various applications, indicating great potential in the field.

NANOSCALE (2022)

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Article Chemistry, Multidisciplinary

Multiscale Charge Transport in van der Waals Thin Films: Reduced Graphene Oxide as a Case Study

Alessandro Kovtun et al.

Summary: This study comprehensively investigates networks of randomly stacked reduced graphene oxide 2D nanosheets, revealing two different charge transport behaviors at a critical temperature T*: Efros-Shklovskii variable-range hopping (ES-VRH) below T* and power law behavior above. A microscopic model is proposed to describe charge transport as a geometrical phase transition associated with the metal-insulator transition, showing the validity of the charge transport behavior for all geometries and defects of the nanosheets and suggesting a generalized description on van der Waals and disordered thin films.

ACS NANO (2021)

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Article Chemistry, Physical

Rapid and facile fabrication of conducting monolayer reduced graphene oxide films by methane plasma-assisted reduction

Yuki Morikuni et al.

Summary: This research article presents a method to fabricate conducting reduced graphene oxide (rGO) monolayer films through methane plasma treatment within few minutes, enabling the nanoscale characterization of local conductivity via conductive atomic force microscopy (C-AFM) and their applicability in highly transparent conducting electrodes.

APPLIED SURFACE SCIENCE (2021)

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Article Chemistry, Physical

Low hysteresis relative humidity sensing characteristics of graphene oxide-gold nanocomposite coated langasite crystal microbalance

Ainan Leong et al.

Summary: The study introduces a RH sensor using LCM coated with Au-GO nanocomposite, showing low hysteresis and high sensitivity when tested under different humidity levels. The sensor's performance was found to be excellent.

SURFACES AND INTERFACES (2021)

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Article Nanoscience & Nanotechnology

Printed Honeycomb-Structured Reduced Graphene Oxide Film for Efficient and Continuous Evaporation-Driven Electricity Generation from Salt Solution

Miao Wu et al.

Summary: This study demonstrates an enhanced evaporation-induced output power in salt solution by utilizing a honeycomb-structured rGO film, leading to a 2-fold increase in open-circuit voltage and a 3.3-fold increase in power density compared to DI water. The generator can work continuously in natural seawater for over 240 hours, showing stable performance and advancing practical applications in water-evaporation-induced electricity generation.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Materials Science, Multidisciplinary

Ultrafast resistive-type γ-Fe2O3-rGO nanohybrid-based humidity sensor - a respiratory monitoring tool

Atul Kumar et al.

Summary: The resistive-type sensing device fabricated on a flexible tempered glass substrate with iron oxide-rGO nanohybrids shows ultra-high sensitivity and ultrafast response and recovery time. This sensor can be used to monitor different breathing patterns and skin evaporation, indicating promising prospects for developing touchless switches and screens in the future.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Chemistry, Physical

Flexible wearable humidity sensor based on cerium oxide/graphitic carbon nitride nanocomposite self-powered by motion-driven alternator and its application for human physiological detection

Likun Gong et al.

Summary: This paper introduces a flexible wearable humidity sensor based on CeO2/g-C3N4 nanocomposite, which can be self-powered by a motion-driven alternator and demonstrated multifunctional application in human respiratory and skin dryness monitoring. The sensor has high sensitivity to humidity changes, with a wide monitoring range and fast response.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

High-performance flexible self-powered tin disulfide nanoflowers/reduced graphene oxide nanohybrid-based humidity sensor driven by triboelectric nanogenerator

Dongzhi Zhang et al.

NANO ENERGY (2020)

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Article Engineering, Environmental

Wafer-scale fabrication of high-purity reduced graphene oxide films as ultrahigh-frequency capacitors with minimal self-discharge

Yongfeng Bu et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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High-Sensitivity Wearable and Flexible Humidity Sensor Based on Graphene Oxide/Non-Woven Fabric for Respiration Monitoring

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LANGMUIR (2020)

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Fabrication of a highly sensitive flexible humidity sensor based on Pt/polythiophene/reduced graphene oxide ternary nanocomposite films using a simple one-pot method

Meng-Shian Tsai et al.

SENSORS AND ACTUATORS B-CHEMICAL (2020)

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Research Progress of Graphene-Based Flexible Humidity Sensor

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SENSORS (2020)

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Flexible and Highly Sensitive Humidity Sensor Based on Cellulose Nanofibers and Carbon Nanotube Composite Film

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Heart Rate, Autonomic Function, and Future Changes in Glucose Metabolism in Individuals Without Diabetes: The Whitehall II Cohort Study

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DIABETES CARE (2019)

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Flexible Smart Noncontact Control Systems with Ultrasensitive Humidity Sensors

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SMALL (2019)

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A Flexible Multimodal Sensor That Detects Strain, Humidity, Temperature, and Pressure with Carbon Black and Reduced Graphene Oxide Hierarchical Composite on Paper

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ACS APPLIED MATERIALS & INTERFACES (2019)

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Two-dimensional, few-layer NiPS3 for flexible humidity sensor with high selectivity

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JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Electrodeposition-based in situ construction of a ZnO-ordered macroporous film gas sensor with enhanced sensitivity

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Laser Direct Writing of a High-Performance All-Graphene Humidity Sensor Working in a Novel Sensing Mode for Portable Electronics

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Exfoliation at the Liquid/Air Interface to Assemble Reduced Graphene Oxide Ultrathin Films for a Flexible Noncontact Sensing Device

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A flexible humidity sensor constructed by ordered-pore-array of slightly reduced graphene oxide with much enhanced sensing response

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