Kalle Salminen’s research while affiliated with Fuzhou University and other places

... Lateral-flow immunoassay using electrochemical transducers is a rapid method for the identification of THC which is able to detect it in an analysis time of 6 min with a detection limit of 1.3 ng/mL [97]. Another electrochemical method using an aptasensor for the detection of THC in saliva showed a one-minute identification [98] with a detection limit of 5 nM in serum, 5 nM in urine and 10 nM in 50% diluted saliva [99]. Despite the fact that these methods are very rapid and have a nanomolar detection limit, they cannot exclude false positive reactions during routine determinations, especially because they do not identify metabolites in the same run. ...

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Cannabis: Zone Aspects of Raw Plant Components in Sport—A Narrative Review

... Following this, the response for ketamine detection was observed at each concentration using CV and LSV. The aptamer-immobilized electrodes were employed to detect ketamine at various temperatures (15,25,35,45,55, 65 • C) and times (5 to 35 s), and the best cyclic response was observed. The target was detected using the electrodes that had been immobilized with the aptamer. ...

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Aptasensor Integrated with Two-Dimensional Nanomaterial for Selective and Sensitive Electrochemical Detection of Ketamine Drug

... Changing the concentration of redox-label modified aptamers is a key point in controlling the spacing of the aptamer [31]. Excessively high aptamer densities result in spatial site-blocking, which prevents target binding, while much lower aptamer densities make the signal undetectable [32]. Therefore, the aptamer concentrations at planar and porous electrodes were optimized (Fig. 2). ...

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Rapid nanomolar detection of cocaine in biofluids by electrochemical aptamer-based sensor with low-temperature effect for drugged driving screening

... Cellulose derivative continued to be a topic of research interest according to its abundant, easy handling, biodegradation [1][2][3]. Carboxymethyl cellulose which is termed CMC, is one of famous examples of cellulose derivatives. Even it is considered as the most used cellulose derivatives in the industry. ...

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The Influence of Moisture on the Electronic Properties of Monomer, Dimer, Trimer and Emeraldine Base Sodium Carboxymethyl Cellulose

... In lignocellulose, this leads to a blueshift (Fig. 5c) and a decrease (Fig. 3a) in emission, as observed in the present study. 6. Phosphorescence was not examined in this study, but reported for cellulose by Grönroos et al. (2018). ...

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Moisture as key for understanding the fluorescence of lignocellulose in wood

... More recently, blends of polystyrene (PS) and PCL as a binder were investigated by our group and found to have much lower capacitance and faster electron transfer kinetics than PCL TPEs due to their surface morphology and enhanced edge plane characteristic [47] . SEM and electrochemistry data indicate PS TPE surfaces have lower roughness and more graphitic edge-plane rich features than PCL TPEs likely owing to aromatic nature of PS which allows interactions to the graphite surfaces through ππ interactions [48] . In addition, PS-based TPEs have been demonstrated to have enhanced electron transfer kinetics compared to previously reported PS electrodes [49][50][51][52] . ...

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All-Solid-State Potassium-Selective Sensor based on Carbon Black Modified Thermoplastic Electrode

... Insulating polymer material surrounds the carbon black particles and enables electrons to be transported through the thin composite layer with very low IR-loss, and finally hot electrons to be emitted at the electrode/solution interface. The main advantage of these novel electrodes over traditional insulating thin-film covered electrodes is their insensitivity to composite layer thickness and composition of the film [9,15,21,22]. Compared to thin insulating film-coated electrode materials, such as aluminum or silicon, composite electrodes are found to have a more stable and reproducible HECL output in a wider pH range, and most importantly, without considerable background emission [15,23,24]. ...

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Immunoassays Based on Hot Electron-Induced Electrochemiluminescence at Disposable Cell Chips with Printed Electrodes

... Solvated electrons, and hydrated electrons in water, are the chemist's perfect reducing agent in many ways. Recently, we made efforts to develop low-cost replacements [6,7] for chemically quite non-resistant oxide-coated aluminium electrodes [8][9][10] and typically a bit too expensive oxide-coated silicon electrodes [7,8] for hot electron injection into fully aqueous electrolyte solutions [1][2][3][4][5]. ...

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Carbon Particle-Doped Polymer Layers on Metals as Chemically and Mechanically Resistant Composite Electrodes for Hot Electron Electrochemistry

... These added co-reactants generate oxidizing radicals upon one-electron reduction (e.g., peroxodisulphate, peroxodiphosphate or hydrogen peroxide) or in the case of azide, upon one-electron oxidation. Thus, both extremely strong oxidants and reductants are produced, and normally one-electron redox reactions not obtainable occur and the excitation of several types of label compounds are enabled [4,9]. There are two major excitation routes: one usually being clearly dominant, and sometimes both excitation routes are almost equally significant, mostly depending on the lifetime and the redox properties of all the radical species involved in the system in aqueous solution. ...

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Immunoassays Based on Hot Electron-Induced Electrochemiluminescence at Disposable Cell Chips with Printed Electrodes

... HECL has been studied with several electrode materials (e.g. Al/Al 2 O 3 , Si/SiO 2 , C/ C x O 1−x and Ta/Ta 2 O 5 ) [6] [9,20,21] and different electrode types such as integrated electrodes [12], microelectrodes with very sharp tips and minimal electrode surface areas [22] and metal/insulator/metal electrodes (e.g. Ta/Ta 2 O 5 /Pt) [23] and lately novel conductor particlesdoped composite electrodes. ...

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Hot electron-induced electrochemiluminescence at cellulose derivatives-based composite electrodes