Nanoparticles affect bacterial colonies’ optical diffraction patterns

Sasanpour, Pezhman; Dilmaghani‐Marand, Arezou; Montazeri, Hojatollah; Ivani, Saeed; Hajipour, Mohammad Javad

doi:10.1039/c8nr09332f

Cited by 5 publications

(4 citation statements)

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“…For example, plasmonic nanomaterials such as gold and silver NPs, which have surface plasmon resonance (SPR) properties, are widely used for bacterial detection. [ 13 ] Once modified with recognition elements (e.g., antibody, phage, or aptamer), they are used for detecting particular bacteria. After specific binding to bacteria (with a sensitivity/detection range for a visible change: 10 3 –10 6 bacteria), mediated by targeting ligands/recognition elements, NPs show plasmon peak shift or aggregation, leading to color changes visible to the naked eye.…”

Section: Nanotechnology‐based Bacteria Detectionmentioning

confidence: 99%

“…The specific binding of NPs to bacteria is also monitored using optical imaging, electrochemical sensing, and spectrometry. [ 13 , 14 ] In addition, label‐free array‐based sensors have also been developed to detect and discriminate bacteria and/or analytes. They consist of cross‐reactive indicators that preferentially interact with bacteria/analytes.…”

Section: Nanotechnology‐based Bacteria Detectionmentioning

confidence: 99%

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Nanotechnology for Targeted Detection and Removal of Bacteria: Opportunities and Challenges

et al. 2021

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The emergence of nanotechnology has created unprecedented hopes for addressing several unmet industrial and clinical issues, including the growing threat so-termed "antibiotic resistance" in medicine. Over the last decade, nanotechnologies have demonstrated promising applications in the identification, discrimination, and removal of a wide range of pathogens. Here, recent insights into the field of bacterial nanotechnology are examined that can substantially improve the fundamental understanding of nanoparticle and bacteria interactions. A wide range of developed nanotechnology-based approaches for bacterial detection and removal together with biofilm eradication are summarized. The challenging effects of nanotechnologies on beneficial bacteria in the human body and environment and the mechanisms of bacterial resistance to nanotherapeutics are also reviewed.

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Section: Nanotechnology‐based Bacteria Detectionmentioning

confidence: 99%

Section: Nanotechnology‐based Bacteria Detectionmentioning

confidence: 99%

Nanotechnology for Targeted Detection and Removal of Bacteria: Opportunities and Challenges

et al. 2021

Self Cite

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“…UV kaynağı altındaki bekleme süresi 240 saate ulaştığında renk açılmaları %93'e ulaşırken, titanyum dioksit ilavesi renk açılmalarını %50'ye ulaşan oranda arttırdığı belirlenmiştir. Staphylococcus aureus ve Escherichia coli bakterilerinin mikrografları, oluşturdukları koloniler ve desenleri (patern) Şekil 11'de görülmektedir [15]. Gümüşün antibakteriyel özelliğinin sadece mikroorganizmaların gümüşü adsorbe etmelerinden kaynaklanmadığını aynı zamanda gümüş iyonunun çözelti içinde serbestçe dolaşmadığı ve inorganik bir bileşik içine yerleştirildiği durumlarda da mikroorganizmaların gümüşü adsorbe etmeden de kolonileşme ve çoğalma özelliklerini yitirdiklerini gözlemişlerdir.…”

Section: Bulgular Ve Tartışmaunclassified

Zeolit Katkısının Antibakteriyel ve Kendi Kendini Temizleyen Harç Özeliklerine Etkisi

Güldaş

Canbaz

Orhan

2021

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Özİnşaat sektöründe son yıllarda yapılan çalışmalarda yapıları sağlık açısından daha güvenli hale getirmek için yapı malzemelerine antibakteriyel özellik kazandırılması ve dış mekândaki korunmasız olarak dış etkilere maruz kalan yapı malzemelerine ışık etkisiyle kendi kendini temizleme yeteneği kazandırılması hedeflenmiştir. Bu çalışmada beyaz ve gri çimento ile üretilen harçlara antibakteriyel özellik kazandırmak amacıyla gümüş iyonları içerikli antibakteriyel toz ve antibakteriyel özellikli sıvı mergal, kendi kendini temizleme özelliği kazandırmak için anataz ve rutil fazında titanyum dioksit tozu, iyon değişimini kolaylaştırmak için zeolit farklı oranlarda ilave edilmiştir. Karışımlardan alınan numuneler üzerinde birim ağırlık, ultrases geçiş hızı, eğilme ve basınç dayanımı deneyleri yapılmıştır. İlave edilen katkıların fiziksel ve mekanik özeliklere etkileri belirlenmiştir. İtalyan standartlarına göre kendi kendine temizleme deneyleri ve Amerikan standartlarına göre antibakteriyel etkinlik deneyleri yapılmıştır. Yapılan deneyler sonucunda ilave edilen katkıların harçların fiziksel ve mekanik özeliklerine olumsuz etkileri olmadığı, titanyum dioksit tozunun kendi kendini temizlemede etkili olduğu ve antibakteriyel katkıların ise bakterilere karşı etkili bir şekilde kullanılabileceği görülmüştür.

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“…Therefore, extensive research has been conducted to develop a rapid, reliable, reagent-free, and user-friendly system. We and others have demonstrated optical techniques that utilize the light scattering or diffraction pattern of a bacterial colony grown on agar plates for bacterial identification [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. The comparison of these technologies are summarized in the Supplementary Materials (Table S1) .…”

Section: Introductionmentioning

confidence: 99%

Development of a Smartphone-Integrated Reflective Scatterometer for Bacterial Identification

Doh

Dowden

Patsekin

et al. 2022

Sensors

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We present a smartphone-based bacterial colony phenotyping instrument using a reflective elastic light scattering (ELS) pattern and the resolving power of the new instrument. The reflectance-type device can acquire ELS patterns of colonies on highly opaque media as well as optically dense colonies. The novel instrument was built using a smartphone interface and a 532 nm diode laser, and these essential optical components made it a cost-effective and portable device. When a coherent and collimated light source illuminated a bacterial colony, a reflective ELS pattern was created on the screen and captured by the smartphone camera. The collected patterns whose shapes were determined by the colony morphology were then processed and analyzed to extract distinctive features for bacterial identification. For validation purposes, the reflective ELS patterns of five bacteria grown on opaque growth media were measured with the proposed instrument and utilized for the classification. Cross-validation was performed to evaluate the classification, and the result showed an accuracy above 94% for differentiating colonies of E. coli, K. pneumoniae, L. innocua, S. enteritidis, and S. aureus.

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Nanoparticles affect bacterial colonies’ optical diffraction patterns

Abstract: Distinct optical diffraction patterns of bacterial colonies in response to SPIONs with various concentrations and surface chemistries are formed.

Cited by 5 publications

References 29 publications

Nanotechnology for Targeted Detection and Removal of Bacteria: Opportunities and Challenges

Nanotechnology for Targeted Detection and Removal of Bacteria: Opportunities and Challenges

Zeolit Katkısının Antibakteriyel ve Kendi Kendini Temizleyen Harç Özeliklerine Etkisi

Development of a Smartphone-Integrated Reflective Scatterometer for Bacterial Identification

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