LSPR‐based colorimetric biosensing for food quality and safety

Abstract

Ensuring consistently high quality and safety is paramount to food producers and consumers alike. Wet chemistry and microbiological methods provide accurate results, but those methods are not conducive to rapid, onsite testing needs. Hence, many efforts have focused on rapid testing for food quality and safety, the advances in nanotechnology, this sensing technique lends itself easily for further development on field-deployable platforms such as smartphones for onsite and end-user applications.

MXene-Based Nucleic Acid Biosensors for Agricultural and Food Systems

“…However, overconsumption of heavy metal-containing food and feed products causes health issues, e.g., cancer, renal damage, nervous system disruption, etc. Mercury (Hg 2+ ) and lead (Pb 2+ ) poisoning are responsible for several diseases and even death due to the ingestion of contaminated food or drinks [ 1 ]. In an electrochemical biosensor designed by Liu et al [ 106 ], Ti 3 C 2 T x MXene/Nafion was modified by GR5 DNAzyme that can cleave the ribo-adenine (rA) site of the DNA substrate in the presence of Pb 2+ .…”

“…To this end, biosensors are being developed to afford inexpensive, portable, and easy-to-operate devices for on-field detection. Biosensors are usually composed of two functional elements: (1) a bio-recognizer (e.g., enzyme, antibody, or nucleic acid (NA) sequences) that specifically recognizes and/or conjugates with target molecules and (2) a physiochemical transducer that translates the biorecognition event into a corresponding detectable signal [ 1 , 2 ].…”

Toward high-performance refractive index sensor using single Au nanoplate-on-mirror nanocavity

“…10,11 In the past few decades, the efforts to realize high performance LSPR sensors have sparked a plethora of designs such as single metallic nanoparticles, [12][13][14] coupled multimers, 15,16 and periodic nanostructures, [17][18][19][20] and witnessed detection success in many fields including chemistry, 7 biology, 21 medicine, 8 the environment 22 and food safety. 23 To evaluate the sensing performance of LSPRs, it is common to use two characteristics, namely the sensitivity denoted as the peak shift per refractive index unit S = dλ/dn and the figure of merit obtained through dividing the sensitivity by the resonance linewidth, FOM = S/Δλ. Naturally, it is indispensable to greatly increase the sensitivity, but meanwhile reduce the plasmon resonance linewidth to realize an ideal LSPR sensor.…”

“…10,11 In the past few decades, the efforts to realize high performance LSPR sensors have sparked a plethora of designs such as single metallic nanoparticles, 12–14 coupled multimers, 15,16 and periodic nanostructures, 17–20 and witnessed detection success in many fields including chemistry, 7 biology, 21 medicine, 8 the environment 22 and food safety. 23…”

Polyelectrolyte-Enhanced Localized Surface Plasmon Resonance Optical Fiber Sensors: Properties Interrogation and Bioapplication

“…In addition, the highly localized and enhanced electromagnetic field of LSPR sensing caused by the metal nanoparticle arrays is perfectly suited to surface enhanced Raman scattering (SERS) analysis . Meanwhile, LSPR provides a simple method of excitement via a self-assembly molecular film on both the plane and curved surface, which contributes to a highly sensitive, real-time, and label-free detection. , Nowadays, the LSPR technique mainly applies in cancer detection, food safety, medical health applications, and other biochemical detections. , Although LSPR sensing technology is a powerful tool in the biochemistry field because of its attractive optical properties, it is still expected to display ultrasensitive and more stable performances.…”