**Silicon**. This element forming the cornerstone of modern civilization occupied too important a position in Xiuxiu's life. The golden decade of her career was almost entirely devoted to how to use light to carve ever‑more‑precise circuits onto this globally‑distributed sand purified to near‑perfection. From conquering DUV to leading High‑NA EUV, she had led her team to push silicon‑based chip‑manufacturing technology to the edge of physical limits—2‑nanometer, even lower‑node processes already visible. Yet standing atop this silicon‑based peak forged by herself and countless peers, the vista Xiuxiu looked toward was not a smooth plain, but an increasingly clear wall built of fundamental physical laws—**the twilight of Moore's Law**.
Beyond that wall lay a new world brimming with temptation and the unknown. There echoed the call of an older yet newer element—**carbon**.
In the String‑Light Research Institute's core‑strategy conference room, the atmosphere was grave yet energized. The huge ring‑shaped holographic screen displayed side‑by‑side two utterly distinct technology‑development roadmaps. Left side: the already‑mature, grand yet increasingly rugged, difficult "silicon‑based technology tree"—its branches growing exceptionally thin and forked as they approached the 1‑nanometer node, relying on more‑and‑more complex, expensive technologies like gate‑all‑around (GAA), complementary‑field‑effect‑transistor (CFET), even two‑dimensional‑material channels; each nanometer advance cost multiplied exponentially. Right side: the path labeled "carbon‑based technology"—emerging from a haze, lines initially slender yet bearing a primitive, powerful vitality—pointing toward a theoretically broader future.
Xiuxiu stood before the screen, posture erect, gaze piercing, sweeping over every core backbone and technical lead present. Among them were veterans who had fought alongside her since the DUV era, and new talents who had emerged during the EUV and High‑NA battles. Their faces held caution toward the unknown, excitement about challenges, but more—a solemnity realizing a historical juncture approaching.
"Colleagues," Xiuxiu's voice was clear and steady, echoing in the silent conference room, "for ten years we broke lithography‑technology barriers, achieving from catching‑up to running‑alongside, even beginning to lead in some domains. We proved that on the silicon‑based chip track, Chinese have the ability to reach the world's forefront." She paused, again glancing at that glorious yet increasingly fatigued silicon‑based route. "But we must face a reality: the physical bottlenecks of silicon‑based chips are objective. Quantum‑tunneling effects, parasitic resistance‑capacitance, terrifying manufacturing costs and power‑density… These cannot be completely resolved by engineering optimization. Moore's Law won't suddenly die; it will gradually age, staggering."
She manipulated the holographic interface, enlarging, highlighting the right‑side "carbon‑based technology" roadmap. "It's time to turn our gaze toward this new continent possibly nurturing next‑generation computing technology. The String‑Light Research Institute decides formally to open a **second front**, launch the 'Genesis' project, targeting directly—**carbon‑based chips**, core being **carbon‑nanotube field‑effect‑transistors (CNTFET)**."
Her words fell; the conference room emitted a faint, suppressed inhalation. Though rumors existed, when this strategic decision was formally announced, it still brought immense impact. This meant a completely new, possibly more‑difficult expedition.
Xiuxiu did not halt; she knew clear logic and convincing prospects were needed to unite team consensus and courage. She began systematically expounding carbon‑based chips' potential, advantages, and enormous challenges that must be faced—a feast of hard‑core knowledge, also a sand‑table simulation of future battlefield.
"First, why choose **carbon nanotubes**?" Xiuxiu pointed to the holographic screen, which began dynamically demonstrating silicon‑atom versus carbon‑nanotube structure comparison. "Silicon crystal is three‑dimensional bulk material, while carbon nanotubes can be viewed as one‑dimensional tubular structures rolled from single‑layer carbon atoms. This fundamental structural difference brings generational performance advantages."
"First, **carrier mobility**." Xiuxiu highlighted a key parameter. "Electrons moving within carbon nanotubes experience far less scattering than in silicon crystals; their mobility theoretically is tens‑ or even hundreds‑times that of silicon. This means under equal voltage, carbon‑nanotube transistors can have higher drive current, faster switching speed—directly bringing a leap in computing speed."
"Second, **ballistic transport**." She continued displaying simulation animation. "In one‑dimensional carbon nanotubes, when the channel length is sufficiently short, electrons can pass through nearly scatter‑free—'flying'—achieving so‑called ballistic transport. This can dramatically reduce transistor power consumption, solving the increasingly severe 'power wall' problem in silicon‑based chips. Theoretically, carbon‑based chips' energy‑efficiency ratio can surpass equivalent‑performance silicon‑based chips by several orders‑of‑magnitude."
"Third, **scale advantage and natural gate control**." Xiuxiu enlarged a carbon‑nanotube‑transistor schematic. "Carbon nanotubes themselves can have diameters as small as 1‑2 nanometers—providing naturally ideal channel material for transistor continuous scaling. Moreover, their cylindrical structure allows gates to perfectly surround the channel, providing optimal electrostatic control, effectively suppressing short‑channel effects—this is what silicon‑based FinFET or GAA structures have been striving to approach."
Advantages were so enticing—seemingly depicting a computing‑technology utopia: ultra‑high speed, ultra‑low power, smaller volume. Undoubtedly this was one ultimate solution to continue, even reshape post‑Moore‑era information‑technology development—the deep, powerful call from carbon.
Yet Xiuxiu pivoted tone; holographic‑screen images also turned complex, covered with red warning signs. "But the road toward this promised land has several nearly‑insurmountable mountains. We must soberly recognize that the challenges we face may be several‑times more arduous than conquering EUV."
"First, the greatest challenge: **material preparation and purification**." Xiuxiu's expression became extremely serious. "What we need are high‑purity, chirally‑consistent (i.e., having same structure and electrical properties) semiconducting carbon nanotubes. Currently, whether chemical‑vapor‑deposition (CVD) or arc‑discharge methods—grown carbon nanotubes are mixtures of metallic and semiconducting types, and chiral distributions random. How to produce, large‑scale, low‑cost, semiconducting carbon nanotubes with purity above 99.9999%—while controlling diameter and chirality—is a 'holy‑grail'‑level challenge the entire industry hasn't yet fully conquered. Any residual metallic nanotubes would cause circuit shorting—all efforts wasted."
"Second challenge: **placement and orientation control**." The screen showed images of carbon nanotubes chaotically distributed on silicon wafers. "Even if we obtain high‑purity semiconducting carbon nanotubes—how to place them at chip‑design‑specified positions, high‑density, high‑uniformity, while maintaining perfect parallel alignment? This involves complex self‑assembly technology, template‑guidance, or directed‑growth techniques—precision and controllability requirements reaching atomic‑level."
"Third challenge: **doping and contact**." Xiuxiu switched to a transistor band‑diagram. "Just as silicon requires doping to form P‑type and N‑type regions, carbon‑nanotube transistors also need effective doping to regulate their electrical characteristics. But carbon nanotubes are chemically inert; traditional methods like ion‑implantation are hardly applicable—requiring developing new doping processes: surface‑charge‑transfer, covalent‑functionalization. Meanwhile, forming low‑resistance ohmic contacts between metal electrodes and carbon nanotubes is another huge problem; contact‑resistance often becomes the performance bottleneck."
"Fourth challenge: **integration and reliability**." The final image showed an initial carbon‑nanotube integrated‑circuit magnification, full of defects and uncertain points. "Integrating billions, even hundreds‑of‑billions carbon‑nanotube transistors together, realizing complex functions, while guaranteeing long‑term stability and reliability—needs considering interface effects, thermal management, radiation‑hardness… another systems‑engineering problem from materials to devices."
Xiuxiu listed these challenges; each like a rugged peak looming ahead. The conference room was hushed; everyone felt the heavy weight. This was no longer optimizing existing processes, but reinventing a new chip‑technology paradigm from the most fundamental material level.
Yet within this silence, a strange, almost‑sacred atmosphere began permeating. Xiuxiu scanned the assembly; in some young researchers' eyes she saw eager‑to‑try light; on some seasoned‑prudent experts' faces she saw grave‑yet‑firm expressions.
"I know—this is hard." Xiuxiu's voice rose again, carrying an unquestionable force. "Perhaps harder than anything we've ever done. But colleagues, please think—why does the String‑Light Research Institute exist? Merely to be best within rules others set?"
She paused, gaze seeming to penetrate walls, seeing farther. "No. Our meaning is to explore the unknown, to **define the future**. In the silicon‑based domain, we were chasers; we proved our ability with sweat and wisdom. Now, in carbon‑based this brand‑new territory—where almost everyone is at same starting line—we have opportunity, and responsibility, to become **rule‑setters**, **definers of future technology**!"
"This is a **historical summons**." Xiuxiu's voice not loud yet bearing metallic tone—striking everyone's hearts. "It calls us to challenge most‑fundamental physics and material problems; to open a new technology path belonging to us, also to all humanity. This isn't merely a research task; this is a mission bearing humanity's evolutionary hope."
She saw team members' spines unconsciously straighten; hesitation in their eyes replaced by a sense of mission. She herself, in these words, more‑clearly felt the transformation of her own role. She was no longer merely a leader solving concrete engineering‑technical problems; she was becoming a **strategic‑direction architect**, a **standard‑bearer attempting to lead industrial change**. From chaser to definer—the distance between must be spanned by projects like "Genesis."
"I decide to personally serve as the 'Genesis' project's **chief director**." Xiuxiu announced. "We will form the most elite cross‑disciplinary team, converging forces of materials‑science, chemistry, physics, electronic‑engineering, even theoretical mathematics. We'll start from the most‑source carbon‑nanotube preparation, build our own, brand‑new R&D and production system. The road ahead is bound to be full of failures and setbacks; but I believe—as long as we maintain that original‑intent and courage ten years ago when we returned from the Netherlands—there's no difficulty we cannot overcome."
The meeting ended in an atmosphere both impassioned and pragmatic. Team members, bearing immense challenges and unprecedented sense of mission, plunged into new‑project preliminary planning.
Xiuxiu remained alone in the conference room, gazing at the holographic‑screen's two parallel technology routes. The silicon‑based road she had walked, leaving deep footprints. The carbon‑based road—mist‑shrouded yet pointing toward star‑sea. She felt a heavy pressure, yet more—a deep‑soul excitement and anticipation. The call of carbon‑based—like ancient genes awakening within her—driving her toward that carbon‑element new‑continent representing computing‑technology future, brimming with infinite possibilities—setting sail. She knew this would be her next, possibly most‑grand heroic epic.