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1. Simultaneous determination of theobromine, theophylline, and caffeine using a modified electrode with petal-like MnO2 nanostructure

Author:
Nia, Nasrin Arefi; Foroughi, Mohammad Mehdi; Jahani, Shohreh
Source:
Talanta 2021 v.222 pp. 121563
ISSN:
0039-9140
Subject:
sensors (equipment),   etc   ; bioavailability; caffeine; chocolate; detection limit; electrodes; manganese dioxide; nanoflowers; nanosheets; oxidation; scanning electron microscopy; theobromine; theophylline;     Show all 13 Subjects
Abstract:
... This study substantially synthesized the β-type MnO₂ nano-flowers assembled by the hierarchical nano-sheets using a simplified hydro-thermal procedure. According to the FESEM images, MnO₂ nano-flower exhibited diameter of ∼800 nm and fabricated with a lot of irregular sheets as a petal-like structure with thickness of several nano-meters. Therefore, the study focused on the construction of an elec ...
DOI:
10.1016/j.talanta.2020.121563

2. Simultaneous determination of direct yellow 50, tryptophan, carbendazim, and caffeine in environmental and biological fluid samples using graphite pencil electrode modified with palladium nanoparticles

Author:
Wong, Ademar; Santos, Anderson Martin; da Fonseca Alves, Rafael; Vicentini, Fernando Campanhã; Fatibello-Filho, Orlando; Del Pilar Taboada Sotomayor, Maria
Source:
Talanta 2021 v.222 pp. 121539
ISSN:
0039-9140
Subject:
sensors (equipment),   etc   ; caffeine; carbendazim; electrochemistry; electrodes; energy-dispersive X-ray analysis; ferricyanides; graphene; nanoparticles; palladium; river water; scanning electron microscopy; surface area; tryptophan; urine; voltammetry;     Show all 16 Subjects
Abstract:
... The present study reports the development of graphite pencil electrode modified with palladium nanoparticles (PdNPs) and its application as an electrochemical sensor for the simultaneous detection of direct yellow 50, tryptophan, carbendazim and caffeine in river water and synthetic urine samples. The combination involving the conductive surface of the graphite pencil electrode (GPE) and the enlar ...
DOI:
10.1016/j.talanta.2020.121539

3. Correction to: A pH-responsive genetic sensor for the dynamic regulation of D-xylonic acid accumulation in Escherichia coli

Author:
Bañares, Angelo B.; Valdehuesa, Kris Niño G.; Ramos, Kristine Rose M.; Nisola, Grace M.; Lee, Won-Keun; Chung, Wook-Jin
Source:
Applied microbiology and biotechnology 2020 v.104 no.5 pp. 2273-2274
ISSN:
0175-7598
Subject:
sensors (equipment),   etc   ; Escherichia coli; pH;     Show all 3 Subjects
Abstract:
... In the published version, the y-axis data of Fig. 3c was incorrectly inserted (OD600 instead of D-xylonate (g L⁻¹) and the x-axes of Figs. 3b, 3d, 3e and 3f ended at 48 h instead of 72 h. See the correct Fig. 3 below. ...
DOI:
10.1007/s00253-020-10362-z

4. Synthesizing of a nanocomposite based on the formation of silver nanoparticles on fumed silica to develop an electrochemical sensor for carbendazim detection

Author:
Özcan, Ali; Hamid, Fayha; Özcan, Ayça Atılır
Source:
Talanta 2021 v.222 pp. 121591
ISSN:
0039-9140
Subject:
sensors (equipment),   etc   ; X-ray diffraction; apple juice; carbendazim; carbon electrodes; catalytic activity; detection limit; dielectric spectroscopy; electrochemistry; energy-dispersive X-ray analysis; nanocomposites; nanosilver; orange juice; oxidation; pesticides; river water; scanning electron microscopy; silica; silver; tomato juice; voltammetry;     Show all 21 Subjects
Abstract:
... In this study, a nanocomposite was synthesized via the formation of silver nanoparticles on fumed silica (FS@Ag) to prepare an electrochemical sensor for the determination of carbendazim (CBZ), a common pesticide. The electrochemical sensor was designed by the combination of the carbon paste electrode (CPE) with the FS@Ag nanocomposite. Based on the electrochemical sensor prepared here, a voltamme ...
DOI:
10.1016/j.talanta.2020.121591

5. 3D Pedestrian tracking using local structure constraints

Author:
Nguyen, Uyen; Heipke, Christian
Source:
ISPRS journal of photogrammetry and remote sensing 2020 v.166 pp. 347-358
ISSN:
0924-2716
Subject:
sensors (equipment),   etc   ; data collection; geometry; people; walking;     Show all 5 Subjects
Abstract:
... Tracking pedestrians based on visual sensors has many diverse applications, among them autonomous driving. Besides obtaining high recall, maintaining the consistency of tracked trajectories during data association is one of the most crucial issues of any tracker. This issue has been tackled in the literature for some time, taking advantage of geometry cues for improving the pairwise matching of de ...
DOI:
10.1016/j.isprsjprs.2020.05.002

6. Design of smart chemical ‘tongue’ sensor arrays for pattern-recognition-based biochemical sensing applications

Author:
Chen, Zi-Han; Fan, Qian-Xi; Han, Xin-Yue; Shi, Guoyue; Zhang, Min
Source:
Trends in analytical chemistry 2020 v.124 pp. 115794
ISSN:
0165-9936
Subject:
sensors (equipment),   etc   ; biochemical pathways; chemical analysis;     Show all 3 Subjects
Abstract:
... Conventional molecular recognition was tightly related to the development of analyte-specific sensor. However, all most every biochemical process are not decided on only one factor. When several factors were imported simultaneously, the established sensor could be seriously interfered and gave the wrong response. In this regard, chemical tongue-mimic sensor array was promoted to recognize a set of ...
DOI:
10.1016/j.trac.2019.115794

7. IoT-based adaptive network mechanism for reliable smart farm system

Author:
Ramli, Muhammad Rusyadi; Daely, Philip Tobianto; Kim, Dong-Seong; Lee, Jae Min
Source:
Computers and electronics in agriculture 2020 v.170 pp. 105287
ISSN:
0168-1699
Subject:
sensors (equipment),   etc   ; Internet; farming systems; monitoring;     Show all 4 Subjects
Abstract:
... This paper presents an adaptive network mechanism for a smart farm system by using LoRaWAN and IEEE 802.11ac protocols. Generally, the internet of things (IoT) system for agriculture application is used in an environment where significant interferences can occur. These interferences can disrupt the network performance of the system. In this paper, an adaptive network mechanism is designed to impro ...
DOI:
10.1016/j.compag.2020.105287

8. Piezoelectric harvester for smart tilting pad journal bearings

Author:
da Silveira, André Rodrigues Garcia; Daniel, Gregory Bregion
Source:
Energy conversion and management 2020 v.205 pp. 112338
ISSN:
0196-8904
Subject:
sensors (equipment),   etc   ; energy; harvesters; models; monitoring;     Show all 5 Subjects
Abstract:
... Piezoelectric harvesters have been the object of constant research due to the increasing need for smart and independent sensors. The main contribution of the present work to this field is the development of a new approach: to harness the vibrational energy from tilting pad journal bearings using piezoelectric harvesters and use it to power typical condition monitoring sensors. The goal of this wor ...
DOI:
10.1016/j.enconman.2019.112338

9. Wireless Single-Electrode Self-Powered Piezoelectric Sensor for Monitoring

Author:
Liu, Qi; Wang, Xiao-Xiong; Song, Wei-Zhi; Qiu, Hui-Jing; Zhang, Jun; Fan, Zhiyong; Yu, Miao; Long, Yun-Ze
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8288-8295
ISSN:
1944-8252
Subject:
sensors (equipment),   etc   ; algorithms; monitoring; pumps; risk; walking;     Show all 6 Subjects
Abstract:
... In complex environments, there are often toxic and harmful conditions, and so self-powered sensors that use wireless access have a huge advantage. However, there is still a risk of short circuit for self-powered sensors in harsh environments. A single-electrode self-powered sensor was designed, which can be used to monitor body movements such as walking and running, as well as monitoring the motio ...
DOI:
10.1021/acsami.9b21392

10. Optical sensors based on silver nanoparticles for determination of pharmaceuticals: An overview of advances in the last decade

Author:
Jouyban, Abolghasem; Rahimpour, Elaheh
Source:
Talanta 2020 v.217 pp. 121071
ISSN:
0039-9140
Subject:
sensors (equipment),   etc   ; chemiluminescence; drugs; fluorescence emission spectroscopy; instrumentation; nanosilver; silver;     Show all 7 Subjects
Abstract:
... This review focuses on optical nanosensors based on silver nanoparticles (Ag NPs) and demonstrates their applications in the determination of pharmaceutical compounds in the last decade. Such optical sensors have received high attention in the analytical field owing to their low cost and simplicity since they do not require any complex or expensive instrumentation. This article reviews Ag NP-based ...
DOI:
10.1016/j.talanta.2020.121071

11. Fabrication of a reversible thermochromism based temperature sensor using an organic–inorganic composite system

Author:
Mehta, Sunita; Kushwaha, Ashok; Kisannagar, Ravinder Reddy; Gupta, Dipti
Source:
RSC advances 2020 v.10 no.36 pp. 21270-21276
ISSN:
2046-2069
Subject:
sensors (equipment),   etc   ; color; films (materials); industrial applications; temperature;     Show all 5 Subjects
Abstract:
... Temperature is considered a crucial physical parameter for several applications ranging from our day to day life to industrial applications. Studies have been reported to monitor the temperature by using various methods. Here, the present study demonstrates the fabrication of a simple and inexpensive temperature sensor based on the phenomenon of thermochromism, that is, the temperature can be moni ...
DOI:
10.1039/d0ra03484c

12. Progress of gold nanomaterials for colorimetric sensing based on different strategies

Author:
Yu, Lili; Song, Zhaorui; Peng, Jun; Yang, Manli; Zhi, Hao; He, Hua
Source:
Trends in analytical chemistry 2020 v.127 pp. 115880
ISSN:
0165-9936
Subject:
sensors (equipment),   etc   ; equipment performance; nanogold; optical properties; solutes;     Show all 5 Subjects
Abstract:
... The development of nanotechnology promotes the progress of analytical methods, especially gold nanomaterials, which have attracted much interest due to their unique optical properties. As they display different colors depending on their size, shape and state of aggregation, it provides excellent platforms for the development of colorimetric sensors in chemical and biological field. For better unde ...
DOI:
10.1016/j.trac.2020.115880

13. Reconstruction of nano-flares based on Au–Se bonds for high-fidelity detection of RNA in living cells

Author:
Zhan, Renhui; Guo, Wenfei; Gao, Xiaonan; Liu, Xiaojun; Xu, Kehua; Tang, Bo
Source:
Chemical communications 2020 v.56 no.38 pp. 5178-5181
ISSN:
1364-548X
Subject:
sensors (equipment),   etc   ; RNA; chemical bonding; chemical reactions; gold; image analysis;     Show all 6 Subjects
Abstract:
... We have, for the first time, developed a Au–Se–DNA nanoprobe by upgrading the conventional Au–S bonds of nano-flares to more stable Au–Se bonds for high-fidelity imaging of target RNAs in living cells. The design concept is potentially introduced into various Au–DNA nanosensors that offer wide application prospects in research and clinical practice. ...
DOI:
10.1039/d0cc01213k

14. Wrist flexible heart pulse sensor integrated with a soft pump and a pneumatic balloon membrane

Author:
Yamaguchi, Takafumi; Yamamoto, Daisuke; Arie, Takayuki; Akita, Seiji; Takei, Kuniharu
Source:
RSC advances 2020 v.10 no.29 pp. 17353-17358
ISSN:
2046-2069
Subject:
sensors (equipment),   etc   ; data collection; health services; heart; monitoring;     Show all 5 Subjects
Abstract:
... To monitor health and diagnose disease in the early stage, future healthcare standards will likely include the continuous monitoring of various vital data. One approach to collect such information is a wearable and flexible device, which detects information from the skin surface. An important dataset is heart pulse information. Herein a method to monitor the detailed pulse signal from a wrist stab ...
DOI:
10.1039/d0ra02316g

15. Ratiometric Photoacoustic Chemical Sensor for Pd²⁺ Ion

Author:
Xiang, Jingjing; Liu, Chuangjun; Zhou, Lihua; Yang, Xing; Li, Ying; Jiang, Yingchun; Mahmood, Tariq; Zhang, Pengfei; Gong, Ping; Cai, Lintao
Source:
Analytical chemistry 2020 v.92 no.7 pp. 4721-4725
ISSN:
1520-6882
Subject:
sensors (equipment),   etc   ; absorbance; analytical methods; fluorescent dyes; palladium;     Show all 5 Subjects
Abstract:
... Recently, small molecule photoacoustic sensors have emerged prominently in chem/biosensing owing to their excellent performance of high contrast, high resolution, and deep penetration depth. However, there has been little report on a photoacoustic sensor for Pd²⁺ detection so far. Herein, a ratiometric photoacoustic Pd²⁺ sensor, Cy-DPA, based on cyanine fluorophore has been developed. The absorban ...
DOI:
10.1021/acs.analchem.9b05807

16. Portable Hg²⁺ Nanosensor with ppt Level Sensitivity Using Nanozyme as the Recognition Unit, Enrichment Carrier, and Signal Amplifier

Author:
Fang, Yumeng; Zhang, Yue; Cao, Leigang; Yang, Jianzheng; Hu, Minghua; Pang, Zili; He, Junhui
Source:
ACS applied materials & interfaces 2020 v.12 no.10 pp. 11761-11768
ISSN:
1944-8252
Subject:
sensors (equipment),   etc   ; colorimetry; cost effectiveness; mercury; metal ions;     Show all 5 Subjects
Abstract:
... We report a portable and highly sensitive Hg²⁺ nanosensor, where the CuS nanozyme functions as an Hg²⁺ recognition unit, a Hg²⁺ enrichment/preconcentration carrier, and a signal amplifier/output unit. The as-designed enrichment-detection integration strategy is customizable and endows the sensor with both a wide detection range from 50 ppt to 400 ppb and a high sensitivity with a minimum detectabl ...
DOI:
10.1021/acsami.0c00210

17. High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit

Author:
Stanford, Michael G.; Zhang, Cheng; Fowlkes, Jason D.; Hoffman, Anna; Ivanov, Ilia N.; Rack, Philip D.; Tour, James M.
Source:
ACS applied materials & interfaces 2020 v.12 no.9 pp. 10902-10907
ISSN:
1944-8252
Subject:
sensors (equipment),   etc   ; electronics; foams; graphene; humans; humidity; scanning electron microscopy;     Show all 7 Subjects
Abstract:
... Laser-induced graphene (LIG) is a multifunctional graphene foam that is commonly direct-written with an infrared laser into a carbon-based precursor material. Here, a visible 405 nm laser is used to directly convert polyimide into LIG. This enabled the formation of LIG with a spatial resolution of ∼12 μm and a thickness of <5 μm. The spatial resolution enabled by the relatively smaller focused spo ...
DOI:
10.1021/acsami.0c01377

18. Time-of-Sight Liquid Flow Measurements in the Low Nanoliters per Minute Scale

Author:
Qin, Chuchu; Dasgupta, Purnendu K.
Source:
Analytical chemistry 2019 v.91 no.22 pp. 14332-14339
ISSN:
1520-6882
Subject:
sensors (equipment),   etc   ; liquids; perfluorocarbons; temperature;     Show all 4 Subjects
Abstract:
... We describe an affordable and robust measurement technique applicable to nanoscale liquid flow. The approach can provide good precision (<1% RSD) in the 1.5–15 nL/min flow range. The motion of a conductive/nonconductive immiscible segmental interface in a capillary is followed by an admittance detector. The conductive marker segment, e.g., a salt solution, is protected on both sides from the princ ...
DOI:
10.1021/acs.analchem.9b02756

19. Microrheology with optical tweezers: peaks & troughs

Author:
Tassieri, Manlio
Source:
Current opinion in colloid & interface science 2019 v.43 pp. 39-51
ISSN:
1359-0294
Subject:
sensors (equipment),   etc   ; optical traps; rheology;     Show all 3 Subjects
Abstract:
... Since their first appearance in the 1970s, optical tweezers have been successfully exploited for a variety of applications throughout the natural sciences, revolutionising the field of microsensing. However, when adopted for microrheology studies, there exist some peaks and troughs on their modus operandi and data analysis that I wish to address and possibly iron out, providing a guide to future r ...
DOI:
10.1016/j.cocis.2019.02.006

20. Gas sensors based on mass-sensitive transducers part 1: transducers and receptors—basic understanding

Author:
Oprea, Alexandru; Weimar, Udo
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.9 pp. 1761-1787
ISSN:
1618-2642
Subject:
sensors (equipment),   etc   ; gases; transducers (equipment);     Show all 3 Subjects
Abstract:
... The scientific interest in gas sensors is continuously increasing because of their environmental, medical, industrial, and domestic applications. This has resulted in an increasing number of investigations being reported in the literature and communicated at conferences. The present review, organized in two parts, addresses the peculiarities of gas sensors based on mass-sensitive transducers, star ...
DOI:
10.1007/s00216-019-01630-7