Summary
Highlights
Smartphones possess immense computing power, surpassing that of early NASA systems, a feat unimaginable 50 years ago. This advancement is largely due to chemistry, with approximately 20 out of 118 elements (mostly metals) used in a typical smartphone.
Metals have distinct physical properties crucial for smartphones: luster for sleek design, strong crystalline structures for durability (though screens remain fragile), malleability for shaping, and excellent electrical conductivity. This conductivity enables capacitive touchscreens, where a grid of conductive metal compounds registers touch by disrupting an electrostatic field. Metals are also ductile, allowing them to be drawn into wires that form the complex pathways transmitting signals to the phone's processor, which acts as its brain.
Metalloids, unlike metals, have luster but are brittle. Their vital role in smartphone processors comes from their semiconducting properties. They can conduct electricity, but not as efficiently as metals, allowing controlled electricity flow through transistors. This controlled flow prevents malfunctions that would occur if highly conductive metals were used in all transistors.
Nonmetals have properties opposite to metals; they are brittle solids or gases, not malleable, conductive, or ductile. Despite their diverse properties, one crucial application is in powering smartphones: the battery. A lithium-ion battery utilizes a positive electrode (often lithium compound) and a negative electrode (carbon, a nonmetal). During charging, lithium ions move from the positive to the negative electrode, and when in use, they move back, generating the energy needed to power the device.
By leveraging the specific properties of metals, metalloids, and nonmetals, extraordinary technological advancements continue to be made. The next time you use your smartphone, take a moment to appreciate the complex chemistry behind its existence.