In the above article <xref ref-type="bibr" rid="ref1">1 , we have found that the contents of Figs. 7 and <xref ref-type="fig" rid="fig9">9 were the same, while the detailed explanations for the two ...figures were correct. After carefully checking the final accepted file uploaded to the submission system and the journal publication file, the above-mentioned mix-up may be triggered by the incautious manuscript proof procedure. More specifically, the mix-up figures were only related to <xref ref-type="fig" rid="fig9">Fig. 9 and did not affect other contents in the manuscript. The correct <xref ref-type="fig" rid="fig9">Fig. 9 is provided as follows.
This review comprehensively covers the electrospun nanofiber, structural and morphological effects on optical sensing, and sensing characters towards environmental toxicants including recent trends, ...breakthroughs and future perspectives.
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•Electrospun optical nanofiber serves better for toxicant sensing.•Optical nanofiber membranes morphology governs the toxicant sensing.•Optical sensory nanofibers work promising with good sensitivity.•Sensing modes and easy readouts contributes for rapid toxicant detection.
Heavy metal and other toxicant detection in natural resources like water, air, soil and food is vital for environmental safety, personal hygiene, and public health care. Abundant number of sensor has acquired its wide and pivotal role in establishing the peaceful and healthy environments. The reliable features such as detection range, response/recovery time, stability and portability is in its urgency for achieving its lifetime applicability. For ultrasensitive chemosensory applications, colorimetric and fluorescent nanofibers engender a linear range, the lowest detection limit, and faster response toward harmful toxic pollutants such as heavy metals and other toxicants including gases, pH, temperature, humidity, and cancer cells. In this review, we surveyed various modes of sensing, sensor fabrication and the evolution of naked eye visible color optical sensors developed with electrospun nanofibrous membranes along with their strength and weaknesses. The review outlines the obstacles, trends and breakthroughs achieved in optical sensory nanofibers and it will definitely inspire the research community in recognizing and overcoming the interdisciplinary challenges to achieve the cleaner greener environment.
CdS nanostructures have received much attention in recent years as building blocks for optoelectronic devices due to their unique physical and chemical properties. This progress report provides an ...overview of recent research about rational design of CdS nanoscale photodetectors. Three kinds of photodetectors according to the metal‐semiconductor contact types are discussed in detail: Ohmic contact, Schottky contact, and field enhanced transistor configuration. The focus is on the tuning of optical and electrical properties CdS nanostructures by element doping, composition and bandgap engineering, and heterojunction integration, along with thus modified device performances generated during these tuning processes. Latest concepts of photodetector design such as flexible, self‐powered, plasmonic, and piezophototronic photodetectors with novel properties are introduced to demonstrate the future directions of such an exciting research field.
Recent advances of CdS nanoscale photodetectors with Ohmic contact, Schottky contact and MESFET configuration are summarized. Element doping, composition and bandgap engineering, heterojunction integration, and new design concepts in photodetectors are discussed. Future development directions are also discussed.
In this work, we demonstrate the use of simple, low-cost, benign, and portable solid-state optical sensor material constructed through direct immobilization of chromoionophoric probe onto a porous ...polymer monolithic template. The fabricated polymer template depicts superior sensing properties such as a high surface area with uniform porous networks, which is suitable for the homogenous dispersion of chromoionophoric probe onto the voluminous cavity of the polymer template. The surface morphological features and the structural analysis of the polymer template are characterized using p-XRD, TEM, SEM, SAED, EDAX, XPS, and N2 isotherm analysis. The impregnation of the probe, 2-(4-(dimethylamino)benzylidene)-N-phenylhydrazine-1-carbothioamide (DABNC) onto the pore surface of the polymer monolith renders superior sensing performance in capturing ultra-trace concentration of Cu2+ ions, which is inferred from a series of visual color transitions (dull white to sap green). The selective naked-eye color recognition is associated with the formation of stable charge-transfer complexes with the chelating sites of the probe molecules with Cu2+ ions. To ensure the effectiveness of ion-sensing, analytical parameters such as solution pH, probe concentration, sensor dosage, temperature, response kinetics, and ion-selectivity amidst matrix ions are systematically optimized. The range of linear response signal is found to be 0–100 μg/L, with a limit of detection and quantification values of 0.15 and 0.56 μg/L, respectively. The used sensor material can be regenerated to its original state, without any loss of its sensing efficacy, up to six regenerative cycles. The practical applicability of the developed sensor is tested using various real water samples, and the analytical data obtained are reliable and reproducible (RSD ≤1.12%, n = 3).
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•DABNC probe anchored porous polymer monolith poly(NAT-EGDMA) as an optical sensor.•A selective and real-time sensing strategy for Cu2+ without sample pretreatment.•The monolithic sensor is durable, reusable, simple to handle, and cost-effective.
We proposed a dual-parameter sensor designed for detecting directional curvature and torsion. The sensor was fabricated utilizing CO2 laser system to inscribe helical long-period gratings (HLPGs) in ...three-core fiber (TCF). These three cores of the TCF are arranged in a straight line, forming an array structure. We conducted experimental studies on the curvature, torsion, and temperature sensing characteristics of TCF-HLPGs with period of 430 μm and period number of 60. In the curvature range from 0.249 m-1 to 0.98 m-1, both dual-resonances (dip C and dip D) near 1550 nm achieve their maximum curvature sensitivity in the 0° curvature direction, where the bend is perpendicular to the axis connecting the three cores, with values of −3.715 nm/m-1 and −9.814 nm/m-1, respectively. In the torsion rate range from −7.98 (rad/m) to 7.98 (rad/m), the torsion sensitivities of dip C and dip D are 0.2 nm/(rad/m) and −0.28 nm/(rad/m), respectively. Enhanced torsional sensitivity of −0.48 nm/(rad/m) is achieved by tracking the wavelength difference between dip C and dip D. This type of sensor is easy to manufacture with high integration, capable of simultaneously achieving dual-parameter sensing of directional curvature and torsion, and effectively eliminating temperature-induced interference. Additionally, its sensitivity is also outstanding., rendering it highly applicable in structural health monitoring and sensing applications associated with vector curvature and torsion.
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•Current progress on luminescent lanthanide nanocomposites for thermal sensing.•Effect of host matrices on thermometry.•Impact of dopant ions and their emission transition on thermal ...sensitivity.•Modern challenges in nanothermometry development.
Recently, there has been observed huge progress in the advancement of remote optical nanothermometry, as it plays a vital role in remote, noninvasive, and remote temperature sensing, which is especially important for various bio-applications, e.g., in theranostics and photodynamic therapy. This is because the luminescence thermometry technique can accurately identify the temperature distribution in the molecular objectives or the biological body. Especially, the use of temperature-induced change in the luminescence intensity ratio (LIR) of two thermally coupled emission bands of lanthanide (Ln3+) ions, embedded in some inorganic nanoparticles (NPs), allows temperature representing of a single living cell. In this review, we comprehensively summarized the concept of luminescence optical thermometry, photophysical properties of Ln3+ ions, synthesis process, and various hosts doped with different Ln3+ ions, in which they act as either sensitizers or activators. Selecting a proper host matrix is an efficient route to achieve the high performance of optical nanothermometers since it takes an important role in determining the luminescent efficiency. Initially, we defined and compared various classes of optical thermometers based on diverse spectroscopic parameters, such as emission intensity, band intensity ratio, bandwidth, band shape, polarization, spectral shift, and luminescence lifetime. Furthermore, we emphasized the most common approach for temperature monitoring, which is based on the thermally coupled levels (TCLs) of Ln3+ ions, by exploiting the LIR technique, since it can provide a fast response with high accuracy, precision, and resolution. Additionally, this review also discusses the recent progress in diverse strategies to boost thermometric performances, such as changing dopants and utilizing various energy transfer mechanisms. Ultimately, we summed up the recent research achievements through analyzing the current research strategies, discussing future guidelines, as well as exploring the major difficulties for further advancement in the area.
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•Silica hybrid materials prepared from silylated fluorophores and their photophysical properties and uses.•Photoactive type II hybrid materials from silylated and non-silylated ...fluorophores.•Fluorescent hybrid-materials and relevant applications.
This review summarizes several aspects of type II photoactive organic-inorganic hybrid materials prepared from silylated fluorophores, including their photophysical properties and uses. In this sense, several examples are presented and discussed taking the nature of the silyl derivative into account. Applications as latent fingerprints detection, chemosensors for metal cations, anions, pH, heavy metals, and small organic molecules, as well as recent use as drug delivery systems, bioimaging, organic solar cells, aerogels, and highly fluorescent hybrid materials, are reported and compared to the literature. Also, fluorescent type II organic-inorganic hybrid materials from non-silylated fluorophores, prepared with binding agents, such as 3-(triethoxysilyl)propyl isocyanate (TESPIC), 3-mercaptopropyltriethoxysilane (TMMPS), or 3-isocyanato propyltrimethoxysilane (ICPTES) are also covered in this review.
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