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Chemosensors, Volume 9, Issue 7

July 2021 - 37 articles

Cover Story: In this paper, we investigate humidity sensing through impedance measurements with TiO2 nanoparticles (about 6 nm in diameter) that are also functionalized with Au nanoparticles. The transient behavior and the impedance spectra are measured and interpreted from the theoretical point of view. Large responses are shown, especially in the relative humidity range 30%–80%, which are essentially explained by condensation in the nanopores. The addition of Au allows for the sensing film response and recovery time to be dramatically reduced, and it seems to favor condensation for RH larger than 70%. The obtained results relate the sensing performance of the nano-structured film to the phenomena occurring during water adsorption, as well as its effect on the electron and ion transports and the film characteristics. View this paper.
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Articles (37)

  • Communication
  • Open Access
15 Citations
7,860 Views
8 Pages

Several bacteria are known to cause food poisoning; therefore, diagnostic systems that detect bacteria are essential. Nucleic acid-based testing methods that involve polymerase chain reaction (PCR) amplification are of great interest due to their hig...

  • Article
  • Open Access
23 Citations
5,350 Views
18 Pages

BODIPY-Pyridylhydrazone Probe for Fluorescence Turn-On Detection of Fe3+ and Its Bioimaging Application

  • Jukkrit Nootem,
  • Chanchai Sattayanon,
  • Rathawat Daengngern,
  • Anyanee Kamkaew,
  • Worawat Wattanathana,
  • Suttipong Wannapaiboon,
  • Paitoon Rashatasakhon and
  • Kantapat Chansaenpak

A novel pyridylhydrazone-tethered BODIPY (BODIPY-PH) was synthesized, fully characterized via nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopic (FTIR), and single-crystal X-ray diffraction (SC-XRD) techniques, and developed f...

  • Article
  • Open Access
106 Citations
6,876 Views
15 Pages

Leftover Kiwi Fruit Peel-Derived Carbon Dots as a Highly Selective Fluorescent Sensor for Detection of Ferric Ion

  • Raji Atchudan,
  • Thomas Nesakumar Jebakumar Immanuel Edison,
  • Suguna Perumal,
  • Rajangam Vinodh,
  • Ashok K. Sundramoorthy,
  • Rajendran Suresh Babu and
  • Yong Rok Lee

Recently, the use of natural products for the synthesis of carbon dots (CDs) has received much attention. Herein, leftover kiwi (Actinidia Deliciosa) fruit peels were successfully turned into beneficial fluorescent carbon dots (KN-CDs) via the hydrot...

  • Article
  • Open Access
1 Citations
3,445 Views
11 Pages

The preparation and testing of a colour-based prototype indicator for high-pressure processing (HPP) are described. The indicator is a layered structure comprising a pressed disc of a mixture of silica gel, which has been previously loaded with a set...

  • Article
  • Open Access
8 Citations
3,651 Views
15 Pages

Optical Sensing of Molecular Oxygen (O2) via Metal Oxide Photoluminescence: A Comparative Study of TiO2, SnO2 and ZnO

  • Ambra Fioravanti,
  • Pietro Marani,
  • Sara Morandi,
  • Laura Giordano,
  • Pasqualino Maddalena,
  • Maria Cristina Carotta and
  • Stefano Lettieri

A comparative study is presented on the photoluminescence (PL) response toward molecular oxygen (O2) in tin dioxide (SnO2), zinc oxide (ZnO) and titanium dioxide (TiO2) nanoparticles. The findings show that both PL enhancement and PL quenching can be...

  • Communication
  • Open Access
9 Citations
2,925 Views
9 Pages

As an essential electrolyte for the human body, the potassium ion (K+) plays many physiological roles in living cells, so the rapid and accurate determination of serum K+ is of great significance. In this work, we developed a solid-contact ion-select...

  • Article
  • Open Access
2 Citations
2,670 Views
9 Pages

As an extremely harmful gas, H2S gas is the major pollutant in construction waste landfill. Herein, a one-dimensional oxide nanomaterial was produced from a simple wet chemical method to serve as a H2S gas sensing material. The SEM observation indica...

  • Article
  • Open Access
17 Citations
3,915 Views
12 Pages

The electromechanical capabilities of carbon nanotube (CNT) doped poly(ethylene glycol) diglycidyl ether (PEGDGE) have been explored. In this regard, the effect of both CNT content and curing conditions were analyzed. The electrical conductivity incr...

  • Article
  • Open Access
32 Citations
4,885 Views
14 Pages

This study used a thiolated calix[4]arene derivative modified on gold nanoparticles and a screen-printed carbon electrode (TC4/AuNPs/SPCE) for Pb2+ and Cu2+ determination. The surface of the modified electrode was characterised via Fourier-transform...

  • Article
  • Open Access
5 Citations
3,201 Views
14 Pages

Quantitative Assessment of Periodontal Bacteria Using a Cell-Based Immunoassay with Functionalized Quartz Crystal Microbalance

  • Satit Rodphukdeekul,
  • Miyuki Tabata,
  • Chindanai Ratanaporncharoen,
  • Yasuo Takeuchi,
  • Pakpum Somboon,
  • Watcharee Boonlue,
  • Yuji Miyahara and
  • Mana Sriyudthsak

Periodontal disease is an inflammatory disorder that is triggered by bacterial plaque and causes the destruction of the tooth-supporting tissues leading to tooth loss. Several bacteria species, including Porphyromonas gingivalis and Aggregatibacter a...

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Chemosensors - ISSN 2227-9040