Scientists at Ben-Gurion University of the Negev (BGU) have designed a new chip device that provides excellent identification of minuscule blood residues for forensic applications.
Criminologists detect microscopic blood drops, as well as DNA, proteins, and low hydrogen peroxide concentrations, using luminol. Not all these can be seen by the naked eye but they become visible via a chemical reaction called “chemiluminescence.”
It is economical and beneficial to detect biological residues using this technique as the detected signal is not dependent on an external light source.
Apart from increasing the chemiluminescent intensity several times, the BGU microfluidic chip also increases the glow time of luminol, allowing the detection of much smaller blood samples in a forensic scene.
BGU Professor Alina Karabchevsky, who is the head of BGU’s Light-on-a-Chip Group and a member of the BGU Unit of Electro-Optical Engineering and the Ilse Katz Institute for Nanoscale Science and Technology, designed this chip device.
The innovation integrates the use of luminol with silver or gold nanospheres in a uniquely developed microfluidic device that expands the detection limit by increasing chemiluminescent light emission and enabling imaging in the chip.
“Our findings open the door to new integrated microfluidic chips,” stated Prof. Karabchevsky. “Practical implementation of this discovered effect will include further superior chemiluminescence-based sensors for forensic science, research in biology and chemistry, and no-source opto-chemical lasers.”
Image Credit: JD Howell, McMaster University
News This Week
Single Dose Nanovaccine Developed to Help Tackle Shigella
Shigella bacteria, which causes Shigellosis, is the primary cause of bacterial diarrhea and diarrheal death among juveniles under five years of age. Because of the antibiotic resistance of Shigella strains, no commercial vaccines are available to date. [...]
Tiny robots with ‘brains’ can walk autonomously inside your body
Scientists have built microscopic robots equipped with electronic “brains” that are capable of walking autonomously. A team from Cornell University in the US developed the solar-powered bots as part of research into a new generation of [...]
Long COVID patients show signs of autoimmune disease a year after infection
Blood samples from patients with long COVID who are still suffering from fatigue and shortness of breath after a year show signs of autoimmune disease, according to a study published today (Thursday) [...]
Inhibiting Ovarian Cancer Growth Using Gold Nanoparticles
High-grade serous ovarian cancer (HGSOC) is among the deadliest human cancers and its prognosis remains extremely poor. An article published in Advanced Science explored the self-therapeutic properties of gold nanoparticles to identify a molecular axis that [...]
New Strategy To Help Chitosan Nanocrystals Target Cells
Antimicrobial peptides (AMPs) have a broad spectrum of antimicrobial activity and lyse microbial cells by interaction with biomembranes, offering great potential in designing new therapeutics. The antimicrobial resistance (AMR) caused due to overuse of [...]
Drug turns cancer gene into ‘eat me’ flag for immune system
Tumor cells are notoriously good at evading the human immune system; they put up physical walls, wear disguises and handcuff the immune system with molecular tricks. Now, UC San Francisco researchers have developed a [...]
New Adjustments to Hyperspectral Microscopy of Nanomaterials
Hyperspectral microscopy is an advanced visualization technique that combines hyperspectral imaging with state-of-the-art optics and computer software to enable rapid identification of nanomaterials. Since hyperspectral datacubes are large, their acquisition is complicated and time-consuming. [...]
Nanoplatforms in Imaging-Guided Brain Tumor Treatment
Malignant brain tumors are cancerous growth in the brain with the possibility of spreading to other parts of the central nervous system (CNS). Brain tumors are highly invasive and have devastating consequences, poor prognosis, [...]
Through the quantum looking glass
An ultrathin invention could make future computing, sensing and encryption technologies remarkably smaller and more powerful by helping scientists control a strange but useful phenomenon of quantum mechanics, according to new research recently published [...]
Good Biocompatibility for Nanocapsules with Healthcare Applications
Methacrylate-based materials are often used in bone cement and dental resins. However, they have high failure rates as they undergo damage within ten years, impacting the quality of patient’s life and increasing healthcare costs. [...]
Portable SARS-CoV-2 Sensor Using Freestanding Laser-Induced Graphene
Early diagnosis of an infectious viral disease can help the patients and health care professionals monitor the outbreaks accurately and provide treatment at the early stage of a disease, avoiding any detrimental consequences. The [...]
“Nanorattles” shake up new possibilities for disease detection
Researchers at Duke University have developed a unique type of nanoparticle called a “nanorattle” that greatly enhances light emitted from within its outer shell. Loaded with light scattering dyes called Raman reporters commonly used [...]
Modified microwave oven cooks up next-gen semiconductors
A household microwave oven modified by a Cornell Engineering professor is helping to cook up the next generation of cellphones, computers and other electronics after the invention was shown to overcome a major challenge [...]
How Can Ion Diffusion Kinetics Influence Nanopore Sensing?
Nanopore sensing has emerged as a versatile approach to detecting and identifying biomolecules. Within this frame of reference, the fast-responding ionic current is considered an essential criterion for accurately measuring small objects with [...]
A plastic film that can kill viruses using room lights
Graphical abstract. Credit: Journal of Photochemistry and Photobiology B: Biology (2022). DOI: 10.1016/j.jphotobiol.2022.112551 Researchers at Queen's University Belfast have developed a plastic film that can kill viruses that land on its surface with room light. The [...]
Bone formation comes down to the nanowire
Nanotechnology that accelerates the transition of stem cells into bone could advance regenerative medicine. A nanotechnology platform developed by KAUST scientists could lead to new treatments for degenerative bone diseases. The system takes advantage [...]
Leave A Comment