One‐Pot Reducing Agent‐Free Synthesis of Silver Nanoparticles/Nitrocellulose Composite Surface Coating with Antimicrobial and Antibiofilm Activities

Abstract

Nitrocellulose with silver nanoparticle (AgNP/NC) composite was prepared in situ using Ag(CH3CO2) and nitrocellulose without any reducing agent. The composite materials synthesized were spray coated onto glass substrates to obtain thin films. The AgNPs/NC composites were characterized by ultraviolet-visible, Fourier transform infrared, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The antimicrobial activity of AgNPs/NC composite was investigated by tube method and time-kill kinetic studies against three microbial species, including Pseudomonas aeruginosa (ATCC 27853), Staphylococcus aureus (ATCC 25923), and Candida albicans (ATCC 10231). The antibiofilm activities were qualitatively determined against all three organisms. Prepared AgNPs/NC films exhibited good antimicrobial activity and significant inhibition of biofilm development against all three microbial species. The effective dispersion of AgNPs/NC in biofilm was responsible for the significant antibiofilm activity of the prepared material. The reported AgNPs/NC composite can be used as coating additive in bacteriocidal paint which can be applied onto surfaces such as in healthcare environments.

Investigation of the Antibacterial Properties of Silver-Doped Amorphous Carbon Coatings Produced by Low Pressure Magnetron Assisted Acetylene Discharges

“…They can be applied on metals, polymers or ceramics of any shape and are extensively used in biomedical applications [ 23 ]. Surprisingly, they are very rarely involved in hospital furniture or hardware (e.g., door handles) even though they could be doped with microbicidal species such as Ag, which has already been incorporated in bactericidal paint [ 24 ] or healthcare personal clothes [ 25 ].…”

Dielectric-Enhanced, High-Sensitivity, Wide-Bandwidth, and Moisture-Resistant Noncontact Triboelectric Sensor for Vibration Signal Acquisition

“…High-resolution XPS spectra of C 1s, N 1s, and O 1s are shown in Figure h,i, respectively. The C 1s spectrum of CNTs/NC can be fitted into five characteristic peaks at 284.8, 286.4, 287.3, 288.4, and 289.2 eV, which are assigned to C–C/CC, C–O, C–O–C, O–C–O, and CO, respectively. , The N 1s spectrum of CNTs/NC shows a peak of 407.68 eV, which is related to the –NO 3 of NC . The O 1s spectrum of CNTs/NC can be fitted into five peaks at 531.6 eV (CO), 532.5 eV (C–O–C), 533.6 eV (–ONO 2 ), 533.8 eV (N–O), and 535 eV (NO). − …”

“…The spectrum of CNTs/NC C 1s shows a marked increase, but O 1s and N 1s exhibit a decrease compared with the pure NC, which is ascribed to the increased contents of CNTs. High-resolution XPS spectra of C 1s, N 1s, and O 1s are shown in Figure 1h,i 40,44 The N 1s spectrum of CNTs/ NC shows a peak of 407.68 eV, which is related to the −NO 3 of NC. 45 The O 1s spectrum of CNTs/NC can be fitted into five peaks at 531.6 eV (C�O), 532.5 eV (C−O−C), 533.6 eV (− ONO 2 ), 533.8 eV (N−O), and 535 eV (N�O).…”

Critical analysis of methods to determine growth, control and analysis of biofilms for potential non-submerged antibiofilm surfaces and coatings

“…Most materials were categorised as biocide releasing (n = 36) or contact active (n = 32) with fewer antiadhesive (n = 10). Biocide releasing surfaces were predominantly reported as using inorganic nanoparticles and powders such as Ag [ [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] ], Cu [ [34] , [35] , [36] , [37] , [38] ], Ti/TiO 2 [ [39] , [40] , [41] , [42] , [43] , [44] , [45] ], ZnO [ [46] , [47] , [48] ], Cu-Zr-Ni [ 49 ], CeO 2 [ 50 ], Ag/TiO 2 [ 44 , [51] , [52] , [53] ], Fe/Fe 3 O 4 [ 44 , 51 ], TaO x N y [ 54 ] as well as loaded-metal organic frameworks (MOFs) [ 55 ], and antibiotics such as gentamicin [ 56 ]. Contact active surfaces utilized a range of approaches including plasma [ [57] , [58] , [59] , [60] , [61] , [62] , [63] , [64] , [65] , [66] , [67] , [68] , [69] , [70] , [71] , [72] ], amino-acids, polypeptides, enzymes [ [73] , [74] , [75] , …”