Topological Radiated Dendrites Featuring Persistent Bactericidal Activity for Daily Personal Protection

Abstract

Many substances in nature show radiated topological structure and possess excellent bio‐adhesion ability. Herein, regulating the topological structure of Zn2GeO4:Mn persistent phosphors is achieved with a molecular coordination method. The morphology of the Zn2GeO4:Mn phosphors is well‐tuned from nanorods to radiated dendrites by changing the coordination capability of the surface ligand. Due to the structural matching and multivalent interactions, Zn2GeO4:Mn radiated dendrites show strong adhesion affinity toward organisms. Moreover, the porous radiated structure offers Zn2GeO4:Mn with a large surface area for photocatalysis. Efficient bacterial adhesion and good long persistent photocatalysis activity are observed in the Zn2GeO4:Mn radiated dendrites, which endows Zn2GeO4:Mn with persistent antibacterial activity even in the dark. Further, the Zn2GeO4:Mn spike flowers loaded fabrics exhibit potent persistent antibacterial properties. Mask and towel fabricated with the antibacterial fabrics can inhibit bacterial growth effectively and no bacteria are observed to pass through the antibacterial mask, suggesting that antibacterial mask can guarantee our health and can be utilized repeatedly. The developed Zn2GeO4:Mn dendrites possess ideal ability in long‐term bacterial inhibition, making them valuable in the fields of medical protection and food packaging.

Protective Face Masks: Current Status and Future Trends

“…Molybdenum disulfide (MoS 2 ) nanosheets have been used to fabricate modified polycotton fabrics with excellent broad-spectrum antibacterial activity even after 60 washing cycles and photothermal properties upon sunlight irradiation (rapid increase of the surface temperature up to ∼77 °C) for complete self-disinfection within 3 min . The porous structure of Zn 2 GeO 4 :Mn-radiated dendrites confers them with a large surface area for persistent photocatalysis and efficient antibacterial activity . Moreover, fabrics loaded with Zn 2 GeO 4 :Mn spike flowers showed potent bacterial growth inhibition.…”

“…188 The porous structure of Zn 2 GeO 4 :Mn-radiated dendrites confers them with a large surface area for persistent photocatalysis and efficient antibacterial activity. 189 Moreover, fabrics loaded with Zn 2 GeO 4 :Mn spike flowers showed potent bacterial growth inhibition. On the other hand, during the current COVID-19 pandemic, numerous additive manufacturing (AM) techniques have allowed the fabrication of not only masks, but also many other types of tools to protect against infection.…”

Nonstoichiometric Nanocubes with a Controllable Morphology and Persistent Luminescence for Autofluorescence-Free Biosensing

“…Persistent luminescence nanoparticles (PLNPs) possess the unique ability to continuously release the trapped excitation energy in forms including luminescence after excitation ceases . Benefiting from great efforts in exploring the functionality of persistent luminescence, − PLNPs have unleashed their fascinating potential in fields ranging from bioimaging to X-ray detection over the past years. − In addition to applications in autofluorescence-free bioimaging, the energy trapped in PLNPs can be released in the form of therapeutic molecules, making PLNPs promising in self-sustained phototherapy. − In addition, the advantages of the long-lived electrons in PLNPs to photocatalysis have been demonstrated in recent years. , Compared to the flourishing progress in application, the controllable synthesis of uniform PLNPs with desired properties lags far behind. − The commonly employed “top-down” synthetic methods for phosphors such as SrAl 2 O 4 /Eu,Dy rely on high-temperature calcination (>1000 °C in a H 2 /Ar atmosphere) and uncontrollable mechanical milling processes, , which produces PLNPs with uneven size distributions, irregular morphologies, and poor surface functionalization . Controllable synthesis of uniform PLNPs through a “bottom-up” manner has received attention in recent years, − but limited achievements have been made.…”

Persistent Production of Reactive Oxygen Species with Zn2GeO4:Cu Nanorod-Loaded Microneedles for Methicillin-Resistant Staphylococcus Aureus Infectious Wound Healing

“…Persistent luminescence nanomaterials (PLNMs) can maintain luminescence for hours or even days after stopping excitation . The special luminescence properties of PLNMs with no need for in situ excitation offer many advantages in eliminating background autofluorescence, making PLNMs promising for autofluorescence-free biosensing and bioimaging. − Recently, the long-persistent photocatalysis (LPPC) effect of PLNMs has aroused increasing interest for constantly carrying out the catalytic reaction to generate ROS after ceasing the excitation light. − For example, PLNMs made of ZnGa 1.995 Cr 0.005 O 4 enhanced cancer cell death after photostimulation and the pre-illuminated Zn 2 GeO 4 :Mn 2+ (ZGM) inhibited bacterial growth in the dark . Persistent ROS production of these PLNMs has positive effects in killing cancer cells/bacteria after stopping illumination.…”

“…21−23 For example, PLNMs made of ZnGa 1.995 Cr 0.005 O 4 enhanced cancer cell death after photostimulation 22 and the pre-illuminated Zn 2 GeO 4 :Mn 2+ (ZGM) inhibited bacterial growth in the dark. 23 Persistent ROS production of these PLNMs has positive effects in killing cancer cells/bacteria after stopping illumination. Nevertheless, the deep exploration of the LPPC effect in PLNMs and the development of PLNMs based on the LPPC effect for biomedical applications still remains a challenge.…”