Development of nanomaterials-fabricated paper-based sensors for the analysis of environmental and biological samples: A Review

2021 ◽  
Vol 17 ◽  
Author(s):  
Monisha ◽  
Kamlesh Shrivas ◽  
Tarun Kumar Patle ◽  
Reena Jamunkar ◽  
Vikas Kumar Jain ◽  
...  
Keyword(s):  
Metal Ions ◽  
Biological Samples ◽  
Low Cost ◽  
Conductive Polymer ◽  
Toxic Metal ◽  
Clinical Samples ◽  
Toxic Substances ◽  
Environmental And Biological Samples ◽  
Printing Techniques

Background: Currently, the environmental and biological samples such as water, soil, vegetables, etc. are highly contaminated with metal ions, anions and pesticides. For analysis of these toxic substances from the environmental and biological samples, sophisticated and expensive instruments are being used. The present work deals with the developmentof a simple, faster, sensitive and economicalmethod forthe analysis of toxic substances present in the different samples. Methods: The general methods for synthesis and characterization of metallic (Ag, Au, Cu and graphene) nanoparticles and conductive polymer for its the development of conductive nano-ink, and fabrication of paper substrate by direct deposition and laser, wax, or inkjet printing techniques is reported. Results: Paper-based sensors fabricated with different nanomaterials used as colorimetric, electrochemical and fluorescence-based chemical sensors for the quantitative determinationof pesticides, toxic metal ions in various biological and clinical samples have been comprehensively discussed in this review. Conclusion: The low-cost, rapid, eco-friendly, flexible, portable, paper-based sensors using nanoparticles (NPs) is on-demand for on-site detection of differentchemical constituents present in various environmental, biological and clinical samples.

PLA conductive filament for 3D printed smart sensing applications

2018 ◽  
Vol 24 (4) ◽  
pp. 739-743 ◽  
Author(s):  
Simone Luigi Marasso ◽  
Matteo Cocuzza ◽  
Valentina Bertana ◽  
Francesco Perrucci ◽  
Alessio Tommasi ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Low Cost ◽  
Conductive Polymer ◽  
Temperature Characteristic ◽  
Temperature Sensors ◽  
Electrical Performance ◽  
Content Type ◽  
Sensing Applications ◽  
3D Printed

Purpose This paper aims to present a study on a commercial conductive polylactic acid (PLA) filament and its potential application in a three-dimensional (3D) printed smart cap embedding a resistive temperature sensor made of this material. The final aim of this study is to add a fundamental block to the electrical characterization of printed conductive polymers, which are promising to mimic the electrical performance of metals and semiconductors. The studied PLA filament demonstrates not only to be suitable for a simple 3D printed concept but also to show peculiar characteristics that can be exploited to fabricate freeform low-cost temperature sensors. Design/methodology/approach The first part is focused on the conductive properties of the PLA filament and its temperature dependency. After obtaining a resistance temperature characteristic of this material, the same was used to fabricate a part of a 3D printed smart cap. Findings An approach to the characterization of the 3D printed conductive polymer has been presented. The major results are related to the definition of resistance vs temperature characteristic of the material. This model was then exploited to design a temperature sensor embedded in a 3D printed smart cap. Practical implications This study demonstrates that commercial conductive PLA filaments can be suitable materials for 3D printed low-cost temperature sensors or constitutive parts of a 3D printed smart object. Originality/value The paper clearly demonstrates that a new generation of 3D printed smart objects can already be obtained using low-cost commercial materials.

Online desalting and sequential formation of analyte ions for mass spectrometry characterization of untreated biological samples

2019 ◽  
Vol 55 (62) ◽  
pp. 9188-9191 ◽  
Author(s):  
Md. Matiur Rahman ◽  
Konstantin Chingin ◽  
Huanwen Chen
Keyword(s):  
Mass Spectrometry ◽  
Metal Ions ◽  
High Voltage ◽  
Biological Samples ◽  
Voltage Polarity ◽  
Nanoelectrospray Ionization ◽  
Sequential Formation

Current-limited high voltage polarity reversing nanoelectrospray ionization allows online separation of intrinsic metal ions in complex biological samples, resulting in the generation of protonated analytes without interference from salt cations.

Structure Characterization of Low Cost Fabricated Soft Material Built Microchannel

2016 ◽  
Vol 857 ◽  
pp. 578-582 ◽  
Author(s):  
Q. Humayun ◽  
Uda Hashim ◽  
Che Mohd Ruzaidi
Keyword(s):  
Biological Samples ◽  
Low Cost ◽  
Soft Material ◽  
Fabrication Process ◽  
Structure Characterization ◽  
Current Paper ◽  
Micro Channel ◽  
Inoculation Technique ◽  
Laboratory Activities

To perform the entire laboratory activities on a centimeter limit scale electronic chip, the most important aspect is to fabricate a device which persist sensitive and selective for the delivery of fluids flow and have the ability to execute a fast mixing of distinctive chemicals and bio samples. To resolve this issues the current paper is one of the good struggle, therefore the objective was arranged in according to the scope of research such as; to design and fabricate a polydimethylsiloxane (PDMS) material made, micro channel and its structure characterization for the investigation of internal subterranean area. By using an AutoCAD software the channel was first designed, however for the fabrication process the design was transferred to mask. Starting from SU-8 resist the pattern was transferred, and then by using the polydimethylsiloxane (PDMS) the mold was fabricated by adopting a low cost photolithography technique. Finally by employing Hawk 3 D surface nanoprofiler the structure was characterized. In our forthcoming research the device will be tested for real biological samples using a simple hand-operated inoculation technique.

scholarly journals Synthesis and Characterization of Piperidin-4-one Derivatives Using Green Solvent

2020 ◽  
Vol 32 (4) ◽  
pp. 727-732
Author(s):  
Harish Sharma ◽  
Rajesh Kumar ◽  
Mahesh Chandra Vishwakarma ◽  
Sushil Kumar Joshi ◽  
Narender Singh Bhandari
Keyword(s):  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Low Cost ◽  
Ion Concentration ◽  
Green Solvent ◽  
Optimum Ph ◽  
Influence Of Ph ◽  
Biosorption Equilibrium

In present study, Pyras pashia leaves were used as low cost biosorbent to study biosorption of Cu(II), Pb(II) and Cd(II) ions from contaminated wastewater. In the employed batch methods pH, contact time, metal ion concentration, temperature, biosorbent doses were taken as study parameters. The pH was varied from pH 1-9 to study the influence of pH on biosorption of metal ions by Pyras pashia. The optimum pH for the removal of Cu(II), Pb(II) and Cd(II) is observed at pH 5. The biosorption equilibrium time was varied between 15-75 min. Langmuir, Freundlich and Temkin isotherms were employed to study the biosorption. The biosorption parameter fits well with Langmuir isotherm. The biosorption of metal ions was increased with increasing biosorbent dose and contact time while increase in pH, metal ion concentration and temperature decrease the biosorption. Thermodynamic data suggest that the bisorption process was spontaneous, feasible and endothermic.

Determination of Manganese(II) using Catalytic hydrogen wave (CHW) technique in Environmental and Biological Samples

2020 ◽  
Vol 16 ◽  
Author(s):  
Niranjan Thondavada ◽  
Rajasekhar Chokkareddy ◽  
Gan G Redhi ◽  
Venkatasubba Naidu Nuthalapati
Keyword(s):  
Biological Samples ◽  
Low Cost ◽  
Background Electrolyte ◽  
Current Method ◽  
Atomic Absorption Spectrophotometry ◽  
Ph Effects ◽  
Experimental Conditions ◽  
Environmental And Biological Samples ◽  
Catalytic Hydrogen ◽  
Ion Effects

: A simple, low cost and highly sensitive catalytic hydrogen wave (CHW) method has developed for the investigation of Manganese(II) in ammonium 4-phenylpiperazine-1-dithiocarbamate and ammonium 4-benzylpiperidine-1-dithiocarbamate in various environmental and biological samples using D.C. polarography. This procedure was based on the reaction of Mn(II) in APP-DTC/ABP-DTC in the presences of NH4Cl-NH4OH medium at pH 6.6 and 7.2 respectively. The resulting oxidation signals were obtained at -0.78 V and -0.64 V vs SCE, owing to the CHWs. Different experimental conditions such as pH effects, background electrolyte (NH4Cl-NH4OH) effects and DTCs and Mn(II) ion effects have been studied. The current method was effectively employed for the testing of Mn(II) in different environmental and biological samples and attained recovery percentages (95-99%) are comparable to the Atomic Absorption Spectrophotometry (AAS) method.

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