No abstract available

No abstract available

No abstract available

No abstract available

No abstract available

[en] Published in summary form only

[en] Highlights: • Nitrogen doped graphene decorated with gold nanoparticles were synthesized. • Au nanoparticles improved the surface area and electron transfer properties of N-G. • Au/N-G composite markedly enhanced the voltammetric response of chloramphenicol. • CAP in real sample was successfully determined on Au/N-G modified electrode. -- Abstract: Nitrogen-doped graphene nanosheets decorated with gold nanoparticles (Au/N-G) were synthesized by the reduction of HAuCl₄ on the surface of N-G using ethylene glycol as the reducing agent. The surface characterization with various techniques such as scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy showed that many gold nanoparticles were effectively loaded on the surface of N-G via the proposed synthesis process. The impedance analysis indicated that Au/N-G was an excellent electrode material possessing outstanding electrochemical features for electron transfer. Using Au/N-G modified electrode, the electrochemical response of chloramphenicol (CAP) was significantly increased due to the synergetic effect of two nanomaterials. Thus, a high-performance electrochemical sensor for CAP based on Au/N-G was developed

[en] Analysis of perfluorooctanoic acid (PFOA) usually requires a combination of high-performance liquid chromatography and mass spectrometry, which is expensive and time-consuming. In the present work, water-soluble CdS quantum dots (QDs) were employed to develop a simple and rapid fluorometric method for the determination of PFOA. Strongly fluorescent CdS QDs were prepared by using 3-mercaptopropionic acid (MPA) as a stabilizer. It was observed that PFOA strongly quenched the fluorescence emission of the MPA-CdS QDs because PFOA promotes the aggregation of MPA-CdS QDs through a fluorine–fluorine affinity interaction. Under optimum conditions, the fluorescence intensity of MPA-CdS QDs was observed to decrease linearly with an increase in the concentration of PFOA from 0.5 to 40 μmol L"−"1, with a limit of detection of 0.3 μmol L"−"1. This new method was successfully implemented for the analysis of PFOA-spiked textile samples, with recoveries ranging from 95% to 113%. - Highlights: • PFOA significantly quenched the fluorescence emission of quantum dots (QDs). • A rapid and simple fluorescence sensor was proposed for determining PFOA by QDs. • PFOA determination could be completed within approximately 10 min. • The developed method had a working range of 0.5 to 40 μmol L"−"1 and a detection limit of 0.3 μmol L"−"1

[en] The High energy γ-rays spectra and its angular distributions from the deexcitation of the giant dipole resonance have been measured from the decay of compound nucleus ¹³²Nd^* formed by the ³²S + ¹⁰⁰Ru reaction at an incident projectile energy of 148 MeV of ³²S. The γ-ray multiplicity distribution of this reaction was determined with a multiplicity filter composed of 38 hexagonal Bismuth Germanium Oxide (BGO) crystals. The shape evolution of the ¹³²Nd^* has been studied as a function of spin. (author)

[en] High spin states in the odd-proton nucleus ¹⁶³Lu populated through the reaction ¹⁴⁸Sm(¹⁹F, 4n)¹⁶³Lu are studied using the in-beam γ-ray spectroscopic method. Level scheme comprising two rotational bands up to spin value of 49/2^- is taken from the γ-γ coincidence data. The yrast band of the ¹⁶³Lu nucleus are assigned as the 9/2^-[514] band, following the systematics from the odd mass Lu isotopes. The unpaired proton has no pronounced effect on the frequency of band crossing associated with the alignment of a pair of i_13/2 neutrons. The nuclear shape changes from a negative γ value to γ 0 degree at the band crossing