Su 8010 sem instrument

All ¹H and ¹³C NMR spectra were recorded in DMSO-d₆ solutions at 298 K using a Bruker (400 MHz) spectrometer with tetramethylsilane as an internal standard. Mass spectra were recorded on matrix-assisted laser desorption ionization time-of-flight MS (MALDI-TOF MS), Performance (Shimadzu, Japan). Perkin Elmer CE-440 was used for micro elemental analyses. Infrared spectra were recorded by Perkin Elmer (Spectrum 100) FT-IR Spectrometer. UV-vis spectra were recorded using Perkin Elmer (Lambda 750) UV/Vis/NIR Spectrometer in ethyl acetate solvent. Fluorescence emission, quantum yield, and lifetime measurements were performed by SHIMADZU Spectro fluorophotometer RF-6000. Aggregations of HQTPE were examined by scanning electron microscopy (SEM) by a Hitachi SU-8010 SEM instrument fitted with a field-emission source and operating at 10 kV. Samples were prepared for SEM by mounting a portion of the cover slide on a silicon stub. Electrochemical measurements were performed on a CH-Instruments Model CHI660D using a one-compartment cell under air atmosphere. The three-electrode system consisted of a platinum counter electrode, an Ag/AgCl reference electrode, and a platinum working electrode.

After irradiation, electron microscopy was performed to analyze cytological morphology [19 (link), 20 (link)]. All experimental bacterial strains were collected and fixed with 2.5% glutaraldehyde. The fixed cells were dehydrated by a graded series of ethanol for 15 min each step. For SEM analysis, cells were transferred to isoamyl acetate and dried in a Hitachi Model HCP-2 critical point dryer (Hitachi, Japan) with liquid CO₂. Pellets for SEM examination were coated with gold and viewed with a Hitachi SU8010SEM instrument (Hitachi, Japan). For TEM analysis, specimens were processed as described previously [20 (link)]. Ultrathin sections (70–90 nm) were stained with lead citrate and uranyl acetate and observed using a Hitachi H-7650 TEM instrument (Hitachi, Japan).