Science Communication

Small Tech.
Big Brain.

Explore how structures a thousand times smaller than a human hair are revolutionizing the understanding and treatment of the nervous system.

1–100nanometers
~86Bneurons in your brain
98%drugs blocked by the BBB
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Drug Delivery

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Neural Interfaces

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Brain & Neuroscience

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What is nanotechnology?

A nanoparticle is between 1 and 100 nm. A human hair is ~80,000 nm wide. At this scale, physics and chemistry behave in radically different ways.

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The Nano Scale

At 1–100 nanometers, materials exhibit entirely new properties. Gold turns red. Carbon becomes stronger than steel. Drugs cross barriers otherwise impenetrable.

H
DNA
NP
Virus
Cell
98%

Blood-Brain Barrier

A highly selective membrane formed by specialized endothelial cells. It protects the brain — but also blocks most drugs. Nanotechnology's primary challenge and greatest opportunity.

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Key Materials

  • Liposomes
  • Lipid Nanoparticles
  • Carbon Nanotubes
  • Gold Nanoparticles
  • Quantum Dots
  • Polymers (PLGA)

A brief timeline

1959

Feynman's vision

Richard Feynman delivers "There's Plenty of Room at the Bottom," imagining manipulation of matter at the atomic scale for the first time.

1981

Seeing atoms

Binnig and Rohrer invent the scanning tunneling microscope (STM). Individual atoms can be visualized for the first time. Modern nanoscience is born.

1995

First nanodrug approved

Doxil — a liposome loaded with doxorubicin — becomes the first FDA-approved nanoparticle drug. The era of nanomedicine begins.

2005

Nanoparticles reach the brain

Studies show polysorbate-80-coated polymer nanoparticles cross the BBB in animal models, opening the path to cerebral drug delivery.

2013

BRAIN Initiative launched

President Obama launches the BRAIN Initiative with billion-dollar funding to map the brain. Nanotechnologies are key tools for new sensors and neural interfaces.

2021

mRNA nanovectors for the brain

After COVID-19 vaccine success, researchers adapt lipid nanoparticles (LNPs) for therapeutic mRNA delivery to the central nervous system.

Future

Toward neural nanorobots?

Research aims at autonomous systems capable of in-situ diagnosis and treatment of brain pathologies. Some projections target 2040–2050.

Key terms

An essential dictionary to navigate the world of neurological nanotechnologies.

Nanoparticle (NP)
Structure sized 1–100 nm. Can be made of gold, polymers, or lipids and functionalized to carry drugs or diagnostic molecules.
Blood-Brain Barrier (BBB)
Formed by specialized endothelial cells lining brain capillaries. Protects the brain from toxins, but also blocks most drugs.
Liposome
Spherical vesicle formed by a lipid bilayer. One of the most used drug delivery systems for both hydrophilic and hydrophobic compounds.
Lipid Nanoparticle (LNP)
Solid lipid nanoparticle made famous by COVID mRNA vaccines. Protects and transports nucleic acids to target cells.
Quantum Dot
Semiconductor nanocrystals that emit light at precise wavelengths based on size. Used as fluorescent probes in neuroimaging.
Carbon Nanotube (CNT)
Cylindrical carbon structure with exceptional electrical and mechanical properties. Used in neural electrodes to improve signal conductance.
BCI (Brain-Computer Interface)
System creating a direct channel between the brain and an external device. Nanotechnologies improve electrode biocompatibility.
Active / Passive Targeting
Passive targeting exploits the EPR effect. Active targeting uses ligands on the nanoparticle surface to bind specific receptors at the target site.
Magnetic Hyperthermia
Iron oxide nanoparticles injected into a tumor are heated by an external magnetic field, destroying cancer cells at 42–45°C.
Neuroinflammation
Inflammatory response in the CNS mediated by microglia and astrocytes. Involved in Alzheimer's, Parkinson's, and ALS.
Amyloid Plaques (Aβ)
Beta-amyloid aggregates that accumulate in the Alzheimer's brain. Functionalized nanoparticles can bind and potentially disrupt them.
Protein Corona
Plasma proteins adsorbing spontaneously onto nanoparticle surfaces in vivo. Modifies their properties and can interfere with targeting.

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