Core Message - Modern technology relies heavily on artificial crystal systems, impacting various fields like electronics, illumination, and communication [1][2][3] - Crystals are essential for computers, mobile phones, navigation systems, military drones, the internet, artificial intelligence, and social media [1] Historical Context & Scientific Breakthroughs - Historically, crystals were used for jewelry and by fortune tellers, but lacked technical significance beyond salt [6][7] - In the mid-19th century, scientists began describing crystal geometry mathematically, identifying 14 different unit cells [9] - Max von Laue's X-ray diffraction in 1912 allowed scientists to visualize the arrangement of atoms within crystals, revealing their symmetrical structure [12][13] - A cubic centimeter of crystal contains approximately 10^22 atoms arranged regularly [13] Technological Applications & Impact - Semiconductor crystals are used in modern LED lamps for light generation and in lasers for cutting, welding, drilling, and data transmission [3] - Quartz crystals oscillate over 32,000 times per second in watches for accurate timekeeping [4] - Piezoelectric crystals generate ultrasound for medical diagnostics, and liquid crystals are used in mobile phone and computer screens [5] - Silicon and germanium crystals are used to construct small electrical devices like diodes and transistors, crucial for radar systems and modern electronics [17][19] Crystal Properties & Artificial Growth - Crystals exhibit regularity, smooth surfaces, sharp edges, transparency, and brilliance due to their ordered atomic structure [8] - The properties of crystals can be altered by introducing foreign atoms into the crystal lattice; for example, iron atoms in quartz create amethyst [15] - Understanding the conditions necessary for artificial crystal growth, such as temperature, pressure, and concentration, is crucial for technological applications [16][17]
The Power of Crystals – About Healing Stones, Jewelry, and Microchips | Dr. Rolf Heilmann | TEDxHHN
TEDx Talks·2025-08-14 14:47